yego.me
💡 Stop wasting time. Read Youtube instead of watch. Download Chrome Extension

Solving equations and inequalities through substitution example 2


less than 1m read
·Nov 11, 2024

Mario started the day with five fire flowers. He used some, and now only has three left. If u is the number of flowers he's used, we can write the following equation: how many fire flowers did Mario use?

So, he started with five, he uses some of them, so we subtract the number he used and he ends up with three. There are a bunch of ways that you could do it. One way is you literally could probably do this in your head.

"Hey, I took away some number from five, and I got three!" You probably know, "Hey, well, if I take two away from five, I'm going to get three." So, he used two flowers.

The other way that you could think about doing it is, "Well hey, we got only four options here. Let me substitute each of them in here." Maybe I was able to do this one in my head, but if I had something more complicated, let me try out these choices.

So if he only took a zero away, it'd be five minus zero; he'd still, of course, be left with five. If he took one away, then of course he'd only have four left. If he took three away, he'd have two left. But if you took two away, five minus two is indeed three.

The third way you'll learn this as we go into more of how algebra works, and also the why, is that you could systematically solve it, but we'll go into that in future videos.

So, he used two fire flowers.

More Articles

View All
Genius: Aretha Chain of Fools Trailer | National Geographic
[Applause] [Music] I’m writing a new song. It’s gonna hit you hard. I thought you were my man. It’ll get under your skin, right down to the ball. It’s gonna be a whole new vibe that brings people together. I’m just unlinking your chains. Well, you only go…
Clearing Everest's Trash - 360 | National Geographic
This is a landfill in the Sagarmatha National Park, home to the world’s tallest peak, Mount Everest. Members of the Sagarmatha Pollution Control Committee, or SPCC, collect and sort trash all the way up to Everest base camp, situated in the Himalayas. Eve…
Hosain Rahman at Startup School SV 2014
Thank you for coming. I hope to do not much talking at all, and I’m going to just ask you because it’s sort of a strange thing you have this. I want you to sort of go through the chronology of the early days, yeah. Um, and talk about you really did have a…
How To Maximize Misery | The 4 Stoic Sins
A Stoic’s end goal is to achieve ‘eudaimonia’, which is a state of flourishing that arises when we live in accordance with nature. But how do we live in accordance with nature? The Stoics believe that this requires living ‘rationally’, and that rational p…
Spotting Ecommerce Trends in Shipping Data - Laura Behrens Wu
How about we just start with a quick intro? Cool. Yeah, thanks for having me! My name is Laura. I run a company called Shippo. We power shipping for e-commerce. What that means is we connect our customers, who are e-commerce stores, platforms, and marketp…
Reasoning with systems of equations | Systems of equations | Algebra I | Khan Academy
In a previous video, we talked about the notion of equivalence with equations. Equivalence is just this notion that there’s different ways of writing what are equivalent statements in algebra. I could give some simple examples. I could say 2x equals 10 or…