Question

Carlos solved the system of equations below. What mistake did he make in his work?

2x + y = 5
x − 2y = 10

y = 5 − 2x
x − 2(5 − 2x) = 10
x + 10 + 4x = 10
5x + 10 = 10
5x = 0
x = 0

2(0) + y = 5
y = 5

He should have substituted 5 + 2x

He did not distribute correctly

He combined like terms incorrectly, it should have been 4x instead of 5x

He made no mistake

Answer 1

Is that like an FLVS test/quiz or something like that?

Answer 2

on second line he figured -2*5 = + 10
distributed wronglyy

Answer 3

Lou...maaaybe :) and cwrw238 thank you ^_^

Answer 4

I've seen those exact questions when I did Alg. I virutal on FLVS. :)

Answer 5

teehee yep i need to have this whole chapter done by tomorrow morning...so i would do it on my own but i forgot almost everything about alg 1 and i need help lol

Answer 6

What chapter are you on?

Answer 7

6

Answer 8

Oh okay. Yeah I finished whole class like 2 weeks ago.

Answer 9

oh gosh thats good..!

Answer 10

Lol was like 5 weeks late. Was my first virtual class and didn't balance out enough time w/ all the school I did at school.

Answer 11

now I'm doing ALg. II, Eng. I, and Bio. I and I'm way ahead of what I'm supposed to do

Answer 12

yea I have a summer job...and volleyball practice so I get help from here every now and then.

Answer 13

oh cool. I think volleyball is pretty fun to play. Yeah I'm just ahead cause I have more time to use.

Answer 14

yea I feel you and thx

Answer 15

No prob. G2g now so see you later

Answer 16

ok bye..fan me :)

Answer 17

Acutally I don't got to go lol :) Nvm.

Answer 18

Just fanned you, but yeah my dad was talking to me, thought i had to go right now but don't.