Question

calcule x nas equações A)7(x-2)=5(x+2) B) 2x+3x+9=8(6-x) C)4(x+10)-2(x-5)=0 D) 3x-2(4x-3)=2-3(x-1) 7 É) 3(x-2)=2x-4​

Answer 1

A)7(x-2)=5(x+2)

7x - 14 = 5x + 10

7x - 5x = 10 + 14

2x = 24

X = 24 / 2

X = 12

B) 2x+3x+9=8(6-x)

5x + 9 = 48 - 8x

5x + 8x = 48 - 9

13x = 37

X = 37 / 13

C)4(x+10)-2(x-5)=0

4x + 40 -2x + 10 = 0

4x - 2x = 0 - 40 - 10

2x = 70

X = 70 /2

X = 35

D) 3x-2(4x-3)=2-3(x-1) 7

3x + 8x + 6 = 2 - 3x + 1 + 7

11x + 6 = 10 - 3x

11x + 3x = 10 - 6

14x = 4

X = 4 / 14

É) 3(x-2)=2x-4​

3x - 6 = 2x - 4

3x - 2x = - 4 + 6

1x = 2

X = 2 / 1

X = 2