Question

What does this even mean???

42x=7

Answer 1

It means that something times 42 equals 7. If you have to find the value of x then you would have x=0.16666 repeating or 1/6
Divide 42 on both sides
42x/42 will cancel out leaving x
x=7/42
x=0.16666 or 1/6

Answer 2

It means that you need to divide 42 on both sides
42x/42=7/42
0.166.....