Question

1-resolva as equaçoes do 1 grau
a) 3x+7=x-3 b)4x-1=3x+2 c)2(x-1)=7+x D)2(x-1)-2(x-2)=-(x-)

e)3-(2x-1)=3(-2x-1)

Answer 1

a)
3x+7=x-3
3x-x=-3-7
2x=-10
x=$\frac{-10}{2}$
x=-5

b)
4x-1=3x+2
4x-3x=2+1
x=3

c)
2(x-1)=7+x
2x-2=7+x
2x-x=7+2
x=9

d)
2(x-1)-2(x-2)=-(x-)
2x-2-2x+4=x
2=x
x=2

e)
3-(2x-1)=3(-2x-1)
3-2x+1=-6x-3
-2x+6x=-3-4
4x=--7
x=$-\frac{7}{4}$