4-2x+3=2x-45 С проверкой

Ответ:

4 - 2x + 3 = 2x - 45 \\ 2x + 2x = 4 + 3 + 45 \\ 4x = 52 \\ x = \frac{52}{4} \\ x = 13 \\ \\ 4 - 2 \times 13 + 3 = - 19\\ 2 \times 13 - 45 = - 19