Question

Resolva as equações

A)3x = -45 - 2x


B) 6(X + 3) - 2 (x - 5)=20


C)-18=2x + 15


D)2(x - 1) - 1= 8​

Answer 1

Resposta:

A) 3x= -45 -2x

3x + 2x = -45

5x= -45

x= -45/5

x= -9

B)  6 · (x+3) -2 · (x-5)= 20

6x + 18 -2x -10= 20

6x -2x +18 -10= 20

4x + 8= 20

4x= 20 - 8

4x= 12

x= 12/4

x= 3

C) -18= 2x + 15

-2x= 15 + 18

-2x= 33

x= - 33/2

D) 2 · (x-1) -1= 8

2x -2 -1= 8

2x -3= 8

2x= 8 + 3

2x= 11

x= 11/2