Question

Resolva as equações do primeiro grau:
a) 3(×-3) = 2(2×+15)
b) 2.(6×-4= 3.(3×-1)
c) 4- (-3×2)= ×+10
d) 2×-1/3= 2/5 ​

Answer 1

a) 3(x - 3) = 2(2x + 15)

3x - 9 = 4x + 30

4x - 3x = - 9 - 30

x = - 39

b) 2(6x - 4) = 3(3x - 1)

12x - 8 = 9x - 3

12x - 9x = - 3 + 8

3x = 5

x = 5/3

c) corrigir

d) 2x - 1/3 = 2/5

2x = 2/5 + 1/3

2x = 6/15 + 5/15

2x = 11/15

30x = 11

x = 11/30