Question

9 X upon 7 minus 6 is equals to 15

Answer 1

9x/7-6=15
9x/1=15
9x=15
x=15/9
x=5/3

Answer 2

$\frac{9x}{7} - 6 = 15 \\ = \frac{9x}{7} = 21 \\ = 9x = 21 \times 7 \\ = 9x = 147 \\ = x = 16.3333333 \\ = x = 16.34$