Question

Use the substitution method to solve the following system of equations. In the below system, solve for y in the first equation.2x + y = 11; 5x – 2y = –1

Answer 1

y = 11 - 2x
thus

5x - 2(11-2x) = -1

Now solve for x

Answer 2

9x-22= -1??

Answer 3

Yeah, that's correct. Add 22 in both sides and divide by 9, x = 3.

Answer 4

ok hold up, the only choices i was given were: –2x + 11
–2x – 11
2x + 11
2x – 11

Answer 5

–2x + 11;
–2x – 11 ;
2x + 11 ;
2x – 11

Answer 6

It should be -2x + 11, it's what you get for y.

Answer 7

oh ok i understand now, thanks!

Answer 8

You are welcome