Question

Me ajudem
A)-2 (1-3) = 18
b) 4 (x-1) -2 (x+4) =6
C)5 (3-x) -4x = 18
D) 9x -3 (2x+2) =15

Answer 1

Resposta:

a)-2(1-3)=18

-2+6=18

4=18

18-4=14

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

4x-4-2x-8=6

4x-2x=6+4+8

2x=18

x=18/2

x=9

c)5(3-x)-4x=18

15-5x-4x=18

-5x-4x=18-15

-9x=3 (-1)

9x=-3

x=-3/9

x=-0.33

d)9x-3(2x+2)=15

9x-6x-6=15

9x-6x=15+6

3x=21

x=21/3

x=7