Question

х:4-13=15; х:9+27=40

Answer 1

1. х = 7
2. × = 1.(4)

Answer 2

x:4-13=15
x:4=15+13
x:4=28
x=28x4
x=112

x:9+27=40
x:9=40-27
x:9=13
x=13x9
x=117