Question

Resolva:
a) 7(x-4)= 2x-2

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

c) 3(5-x) -3 (1-2x)= 42

d) 4x-10= 2x+2

e) 5x+7= 4x+10

Obrigado!

Answer 1

a) 7(x - 4) = 2x - 2

7x - 28 = 2x - 2
7x - 2x = -2 + 28
5x = 26
x = 26/5
.
.
b) 2x + 3x + 9 = 8 (6 - x)

5x + 9 = 48 - 8x
5x + 8x = 48 - 9
13x = 39
x = 39/13
x = 3
.
.
c) 3 (5 - x) - 3( 1 - 2x ) = 42

15 - 3x - 3 + 6x = 42
-3x + 6x = 42 - 12
3x = 30
x = 30/3
x = 10
.
.
d) 4x - 10 = 2x + 2

4x - 2x = 2 + 10
2x = 12
x = 12/2
x = 6
.
.
e) 5x + 7 = 4x + 10

5x - 4x = 10 - 7
x = 3



☆Espero ter ajudado! tmj