Question

qual é o valor da equaçao 9.(x+1)+7.(3-x)-38=0

Answer 1

9.(x+1)+7.(3-x)-38=0
9x + 9 + 21 - 7x - 38 = 0
9x - 7x + 30 - 38 = 0
2x - 8 = 0
2x = 8
x = 8 / 2
x = 4