Question

How do you solve `\frac { 6} { 10} = \frac { r - 7} { r - 6}`?

Answer 1

34/4

Explanation:

1) Cross multiply:
10(r-7) = 6(r-6)
10r -70 = 6r -36
10r - 6r = -36 + 70
4r = 34
r = 34 / 4