Question

New Math problem!

Answer 1

6.02] 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

Answer 2

Multiple Choice...
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 3

-2*5=-10

Answer 4

so than 5x-10=10
5x=20
x=4

Answer 5

What did he do wrong though? I looked twice and can't find it.

Answer 6

Here are the choices...
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 7

what i have wrote it before litle up

x-2(5-2x)=10 so here will be

x-10 +4x =10 and not how he have wrote x+10+4x=10

ok ?

Answer 8

Ok...:)

Answer 9

Which multiple cgh?