Question

12-4/5(x+15)=4

Answer 1

\[12-\frac{ 4 }{ 5 }(x+15)=4\]
1. distribute the fraction across the parenthesis: \[12-\frac{ 4 }{ 5 }x+(\frac{ 4 }{ 5 } \times \frac{ 15 }{ 1 })=4\]
You can do the arithmetic there.
What you're doing is solving for "x".

Answer 2

Use your algebraic tools such as subtracting, addition, division and multiplication to isolate "x" on just one side.