Question

me ajudem pf e pra amanhã: x+3[2x+3(x+4)]=20

Answer 1

x + 3 [2x + 3 (x + 4)] = 20
x + 3 · [2x + 3 · (x + 4)] = 20
x + 3 · [2x + 3x + 12] = 20
x + 6x + 9x + 36 = 20
x + 6x + 9x = 20 - 36
16x = - 16
x = -16/16
x = -1