Question

a) 2(x+2)=12

b) m=-3(m-4)

c) 2(m+5)=-3(m-5)

d) -2(y+4)=-7+9(y-1)

me ajudem ​

Answer 1

Resposta:

2(x+2)=12

2x+4=12

2x=12-4

2x=8

x=8:2

x=4

m=-3(m-4)

m= -3m +12

m+3m=12

4m=12

m=12:4

m=3

2(m+5)=-3(m-5)

2m+10= -3m+15

2m+3m=+15-10

5m=5

m=5:5

m=1

d) -2(y+4)=-7+9(y-1)

-2y-8= -7+9y-9

-2y-9y= -7-9+8

-11y= 8

y= 8/11