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Given question has one unknown variable X.

To solve for X the first step is to add 10 on both sides of the equation.

This gives 48 X - 10 + 10 = 10 + 2 => 48 X = 12.

Now, divide 48 on both sides of the equation to have variable X all by itself.

48 X/ 48 = 12/ 48 => X = 1/ 4.

Given question has one unknown variable Z.

To solve for X the first step is to add 18 on both sides of the equation.

This gives 5 Z - 18 + 18 = 18 + 12 => 5 Z = 30.

Now, divide 5 on both sides of the equation to have variable Z all by itself.

5 Z/ 5 = 30 / 5 => X = 6/ 1.