32＋x=58
x=58-32
x=26
x-4.2=0.79
x=0.79+4.2
x=4.99
4x=44
x=44÷4
x=11
x÷18=29
x=29×18
x=522
6x=30
x=30÷6
x=5
15÷x=0.5
x=15÷0.5
x=30