Question

X/5-g=a for x

Answer 1

so what you do is multiply x from the x/5-g to the x on the other side of the equal sign so it would in the end it would look like this

x=a(5-g)
and then you distribute the a

x=5a-ga

when there's a fraction and you're trying to get rid of the denominator. you multiply that denominator to the top of the fraction so you can cancel it
like this

x/y=z
multiply each side by y

y(x/y)=y(z)

the y cancels out on the left

and then you're left with x=yz
do you kind of get it?