Question

Resolva as equações
A)3(×-2)=2×-4
B)7(×-4)=2×-3
C)2×+3×+9=8(6-×)
D)3(2×+3)-4(×-1)=3
E)3(5-×)-3(1-2×)=42

Answer 1

Resposta:

A)3(×-2)=2×-4

3x - 6 = 2x - 4

3x - 2x = 6 -4

X = 2

B)7(×-4)=2×-3

7x -28 = 2x - 3

7x -2x = 28 -3

5x = 25

x= 25/5

x=5

C)2×+3×+9=8(6-×)

5x + 9 = 48 - 8x

5x+8x = 48 -9

13x = 39

x= 39/13

x=3

D)3(2×+3)-4(×-1)=3

6x+9-4x+4 = 3

6x-4x= 3-4-9

2x= -10

x= -10/2

x= -5

E)3(5-×)-3(1-2×)=42

15-3x-3+6x=42

-3x+6x=42-12

3x = 30

x=30/3

x=10