Question

3 (5-3) -3 (1-2x) = 42

Answer 1

$3 (5-3) -3 (1-2x) = 42 \\15-9-3+6x=42 \\3+6x=42 \\6x=42-3 \\6x=39 \\x=\frac{39}{6} \\x=\frac{13}{2}$