Question

3×+1 + 3×-2 - 3×-3 + 3×-4=750

Answer 1

3×+1 + 3×-2 - 3×-3 + 3×-4=750
3×+3×-3×+3× = 750-1+2+3+4
6× = 758
× = 758/6
× = 126,33

Um abraço.

Answer 2

$3x+1 + 3x-2 - 3x-3 + 3x-4 = 750\\\\ 3x + 3x - 3x +3x = 750 -1+2+3+4\\\\ 6x = 758\\\\ x = \frac{758}{6} \\\\ x = 126,333...$