Question

x+12=20
x-12=20
x·5=10
x/5=10

Answer 1

1) x+12=20 x=20-12 x=8 2)x-12=20 x=20+12 x=32 3)x·5=10 x=10/5 x=2 4)x/5=10 x=10·5 x=50