Question

How do you solve this question using substitution 2r + s = 11 and 6r - 2s = -2? Please help me and explain along the way

Answer 1

take the 1st equation and make s the subject, then substitute that into the 2nd equation.

Answer 2

I did n I got a decimal I think I did something wrong

Answer 3

well you do have a mistake...

you need to take care when distributing -2 (11 - 2r)

Answer 4

Ok yea so its -22 + 4r?

Answer 5

so you have

6r - 22 + 4r = -2

or

10r - 22 = -2