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Mathematics 9 Online
Kabbed:

@dude

Kabbed:

First step I will subtract 3y from both sides of the equation. x = 8-3y 2x-y= 2 Solve the first equation x = 8 - 3y 2(8-3y)-y=2 Solve the second equation solve for y x = 8-3y y = 2 Replace y with 2 x = 8 - 3 * 2 y=2 Simplify x = 8 - 3 * 2 x=2 y=2 (2,2)

Kabbed:

x + 3y = 8 2x - y = 2 was the question I solved by substitution

Kabbed:

Solve the first equation x = 8 - 3y 2(8-3y)-y=2 Solve the second equation solve for y x = 8-3y y = 2 this part

Kabbed:

2(8-3y)-y=2 in this part my teacher asked what did I do with the 2

Kabbed:

and I couldn't answer because I didn't know what I did with the 2

Kabbed:

@AnimeGhoul8863

dude:

Okay your work is a bit confusing, you have 2 different equations and describing steps for 1 but not sure which

Kabbed:

this is a system of equations

Kabbed:

This is the question | | V x + 3y = 8 2x - y = 2

Kabbed:

First step I will subtract 3y from both sides of the equation. x = 8-3y 2x-y= 2

Kabbed:

first step ^

Kabbed:

Second and Third step Solve the first equation x = 8 - 3y 2(8-3y)-y=2 Solve the second equation solve for y x = 8-3y y = 2

Kabbed:

I don't understand this part it says solve the first equation but we solve 2x-y= 2

Kabbed:

@dude

dude:

Yes I know what systems of equations are. Don't write the second equation if you aren't doing anything to it

Kabbed:

lol

Kabbed:

I figured out what I did wrong

dude:

\(\color{#0cbb34}{\text{Originally Posted by}}\) @Kabbed Second and Third step Solve the first equation No, this doesn't imply anything, say substitute x = 8 - 3y 2(8-3y)-y=2 Solve the second equation solve for y Once you substitute, there is only 1 equation. Not 2. x = 8-3y y = 2 \(\color{#0cbb34}{\text{End of Quote}}\)

Kabbed:

thank you

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