Question

Resolva as equações:
a) 15+ (-2x-1)= 3(-2x+2) + 24
b) 5(2x-4) + 5(-x+4) =100
c) 12x +10(3-x) = 12
d) 23x+6 = 4x+12

Answer 1

Resposta:

a- x= -5

b- x= 20

c- x= -9

d- x= 0.31

Explicação passo-a-passo:

15+ (-2x-1)= 3(-2x+2) + 24

15-3-24=-(2×+2)-(-2×-1)

-6=-2×+1+2×-2

-5=×

5(2x-4) + 5(-x+4) =100

10×-16-5×+16=100

10×-5×=100

5×=100

×=100/5

×=20

12x +10(3-x) = 12

12×+30-10×=12

2×=12-30

×=-18/2

×=-9

23x+6 = 4x+12

23×-4×=12-6

19×=6

×=6/19

×=0.31