Question

PLS HELP WILL GIVE MEDAL AND FAN!!!!!!!!!!!!1
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

A) He should have substituted 5 + 2x

B) He did not distribute correctly

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

D) He made no mistake

Answer 1

Any ideas?

Answer 2

No......

Answer 3

Check out line 2 and 3

What's -2 times 5

Answer 4

-10

Answer 5

On the next step, did he put -10

Answer 6

No he didn't

Answer 7

x − 2(5 − 2x) = 10
x + 10 + 4x = 10


Does − 2(5 − 2x) = 10 + 4x ?

Answer 8

-2 x 5 = -10 not 10

Answer 9

So it should be B

Answer 10

Thanks!!!

Answer 11

If you got the answer please close the question thank you