Question

7 x - 5 { 3 x - 1 + 7 - 4 x }

Answer 1

$7x - 5(3x - 1 + 7 - 4x) = \\ 7x - 15x + 6 - 35 + 20x = \\ 12x - 29. \\ \\ \\ \huge\boxed{ \tt\frac{BURNS}{answers}}$

Answer 2

 7x - 5( 3x - 1 + 7 - 4x)

 7x - 15x + 6 - 35 + 20x

         12x - 29