Question

Given that R=9x+8y find x when y=8 and R=4

Answer 1

`-(20)/(3)`

Explanation:

R=9x+8y

y=8 and R=4

4= 9x + 8.8

4 = 9x + 64

4 - 64 = 9x

-60 = 9x

-60 / 9 = x

-20/3 = x

Hope this helps ^-^

Answer 2

Explanation:

R = 9x + 8y

4 = 9x + 8*8

4 = 9x + 64

Subtract 64 from both sides

4 - 64 = 9x + 64 - 64

-60 = 9x

Divide both sides by 9

-60/9 = 9x/9

-20/3 = x

x = -6 2/3