Question

gente me ajudem essas equações por favor:
a) -3.(-2x+5)=15
b) 5x+3-6x=10
c) 6x+2x-10=-2x+10
d) 2.(x+2)=8​

Answer 1

Explicação passo-a-passo:

a) -3.(-2x+5)=15

(-2x+5)=15/-3

(-2x+5)=-5

-2x=-5-5

-2x=-10

x=-10/-2

x=5

b) 5x+3-6x=10

5x-6x=10-3

-x=7

x=7/-1

x=-7

c) 6x+2x-10=-2x+10

8x-10=-2x+10

8x+2x=10+10

10x=20

x=20/10

x=2

d) 2.(x+2)=8

x+2=8/2

x+2=4

x=4-2

x=2

Answer 2

$-3(-2x+5)=15\\6x-15=15\\6x=15+15\\x= \frac{30}{6} \\x= 5$

$5x+3-6x=10\\5x-6x=10-3\\-x=7 (-1)\\x=-7$

$6x+2x-10=-2x+10\\8x-10=-2x+10\\10x=20\\x=2$

$2(x+2)=8\\2x+4=8\\x=8-4/2\\x=4/2\\x=2$

Bons estudos!