Question

cuanto es 6 – x = 4 . ( x + 3 ) – 7 . ( x – 4 )​

Answer 1

$6 - x = 4.(x + 3). - 7(x - 4) \\ 6 - x = 4x + 12 - 7x + 28 \\ 6 - x = - 3x + 40 \\ 3x - x = 40 - 6 \\ 2x = 34 \\ x = 34 \div 2 \\ x = 17$

Espero ayude