Question

determine as equações do 1° grau
x+4=5-2x

-4+2=x

8+16=x+25

9-8+7=x-7

2+x=4​

Answer 1

x+4=5-2x

x+2x=5-4

3x=1

x=1/3

-4+2=x

-2=x

x=-2

8+16=x+25

24=x+25

-x=25-24

-x=1(-1)

x=-1

9-8+7=x-7

1+7=x-7

8=x-7

-x=-7-8

-x=-15(-1)

x=15

2+x=4

x=4-2

x=2