Question

Resolva as seguintes equações do 1° grau.
a)5y-3= -y+9

b)5.(2x+1)= 2x+3

c)-10+4Z= -Z+5

d)8.(Z+27= +16

e)3.(4x-5)= 4.(x-3)

f)3x-4-3= -x-x+2

Answer 1

a)5y-3=-y+9
5y+y=9+3
6y=12
y=12÷6
y=2

b)5.(2x+1)=2x+3
10x+5=2x+3
10x-2x=+3-5
8x=-2
x=-2/8

c)-10+4z=-z+5
4z+z=5+10
5z=15
z=15÷5
z=3

d)8.(z+27)=16
8z+216=16
8z=16-216
8z=-200
z=-200÷8
z=25

e)3.(4x-5)=4.(x-3)
12x-15=4x-12
12x-4x=-12+15
8x=3
x=3/8

f)3x-4-3=-x-x+2
3x+7=2x+2
3x-2x=2-7
x=-5