Question

resolva as equações a seguir a) 2x+3=7 b)-4x+4/5=8 c) 3y-2=5 d) 2b+2=-4

Answer 1

a)2x+3=7

2x=7-3

2x=4

x=4/2

x=2

b)-4x+4/5=8

-20x/5+4/5=40/5

-20x+4=40

-20x=40-4

-20x=36

x=36/-20

x=-1.8

c)3y-2=5

3y=5+2

3y=7

y=7/3

d)2b+2=-4

2b=-4-2

2b=-6

2b=-6/2

b=-3