I'll only solve the 1st one, I think you can do the rest.
Multiply both sides by ,
Now multiply both sides by ,
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If you have an equation in the from , products of the terms crosswise are equal,
So,
Initial Equation
You want to get x in the numerator so multiply both sides by x
Simplifly
You want x to be by itself, so you need to get rid of the 7 in the denominator. You can do this by multiplying both sides by 7 since 7/7 =1
Simplify
You want to get x by itself, so you need to get rid of the 5, do this by multiplying both sides by 1/5 since 5/5=1
Simplify
Initial equation
Again, you need to get x out of the denominator, so multiply both sides by x-3
X is still in the denominator on the right side, so multiply both sides by x+3
Distribute the coefficients
You need all your x's to be on the same side, so subtract 24x
Simplify
You need all the other numbers to be on the other side of x, so add 216
Simplify
You need x to be by itself, so multiply by 1/48
And simplify