Question

solve 3+7+7+a =7/7*1+8,find a

Answer 1

3+7+7+a = $\frac{7}{7}$ ×1+8

17+a= 1×9= 9

a=9-17 = -8

Answer 2

$3 + 7 + 7 + a = 7 \div 7 \times 1 + 8$
17± a= 9
a= 9-17= -8
I hope it will help you