4x = 56

x - 6.6 = 15.7
100 = 5x

please help

3 answers

1st: divide both sides by 4
2nd: add 6.6 to both sides
3rd: divide both sides by 5

time to review the basic rules of solving equations
i got 6.6 and 13 .88
no idea what you are doing to get those numbers, or which equation they are to match
I told you how to solve them.

1) 4x = 56
divide both sides by 4
x = 56/4 = 14

2) x - 6.6 = 15.7
add 6.6 to both sides
x = 22.3

3) 100 = 5x
5x = 100
divide both sides by 5
x = 20