Question

qual e a equação 2×+1=4×-7?​

Answer 1

Resposta:

$2x + 1 = 4x - 7 \\ 2x - 4x = - 7 - 1 \\ - 2x = - 8 \times ( - 1) \\ x = \frac{8}{2} = 4$

$2 \times 4 + 1 = 4 \times 4 - 7 \\ 8 + 1 = 16 - 7 \\ 9 = 9$