Question

resolva a equação
a) 4×-12=-6×+38
b) 5(×-2) +4×=3×-60
c) 8×+2(×+5) =40-3×

Answer 1

a)

4×-12=-6×+38

4x + 6x = 38+12

10x = 50

x = 50/10

x = 5

b)

5(×-2) +4×=3×-60

5x - 10 + 4x = 3x - 60

9x - 10 = 3x - 60

9x - 3x = - 60 + 10

6x = - 50 (:2)

3x = - 25

x = - 25/3

c)

8×+2(×+5) =40-3×

8x + 2x + 10 = 40 - 3x

10x + 10 = 40 - 3x

10x + 3x = 40 - 10

13x = 30

x = 30/13