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
4 Ways To Deal With 'Toxic People'
Today, I shall be meeting with interference, ingratitude, insolence, disloyalty, ill-will, and selfishness, all of them due to the offenders ignorant of what is good or evil. We all know someone in our lives that’s so exhausting to be around. There’s alwa…
NEW! Khan Academy's AI Tutor, Khanmigo - In Depth Demo
Hey everyone, Sal here, and I wanted to show you an in-depth demo of the new AI that we have happening throughout Khan Academy. What you’re going to see is that it exists in two ways. One is helping students and learners and teachers with many of the thi…
An Alaskan Storm - Behind the Scenes | Life Below Zero
We are here to document the lives of people living in Alaska. The harsh reality is the environment we’re up against. It makes it tough to do our job. Get out of there, working on Life Below Zero can be very dangerous. Guns here, cameras here; never know w…
The Stock Market Is Broken
What’s up, you guys? It’s Graham here. So, we got to take a moment and talk about something serious—something that no investor wants to think about, something that’s happened in the past but many people feel is going to happen again in the future. And no,…
This TRANSPARENT ENGINE is Fascinating (How Engines Work) - Smarter Every Day 292
Where should the camera be? Oh, wherever. [Smashed the Gas] HOLY…. ENGINE ROARS Hey, it’s me, Destin. Welcome back to Smart Every Day. We have explored internal combustion engines on this channel, and I think they’re amazing. In the past, we visited a You…
The Craziest Philosopher of All Time
The abstract world of philosophy is interesting. From stoicism to nihilism to absurdism, there were many different schools of thought trying to teach us how to think, act, and tell right from wrong. But have you ever felt that philosophy is sometimes a bi…