Question

resolva as questoes do 1° grau×+×-4=17-2×+1

Answer 1

X + X - 4 = 17 - 2X + 1
2X + 2X = 17 + 1 + 4
4X = 22
X = 22/4 = 11/2

Answer 2

x + x - 4 = 17 - 2x + 1
2x - 4 = 18 - 2x
2x + 2x = 18 + 4
4x = 22
x = 22  (:2)
      -----
        4  (:2)

x = 11/2