seven less than 9 times a number is equal to 20 more than a number

Answer 1

Seven less than 9 times a number:

9x - 7

is equal to 20 more than a number:

x + 20

So that gives us:

9x - 7 = x + 20

Subtract x:

8x - 7 = 20

add 7:

8x = 27

Divide by 8:

x = ²⁷/₈, or 3 ³/₈