Question

resolva as seguintes equaçoes do 1 grau com uma incógnita |R
A) 3X+7=X-3
b) 4x-1=3x+2
c)2(x-1)=7+x
d)2(x-1)-2(x-2)=-(x-3)
e)3-(2x-1)=3(-2x-1)

Answer 1

a) 3x+7=x-3
3x-x=-3-7
2x=-10
x=-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-3)
2x-2-2x+4=-x+3
2x-2x+x=3-4+2
x=3-2
x=1
e) 3-(2x-1)=3.(-2x-1)
3-2x+1=-6x-3
-2x+6x=-3-1-3
4x=-7
x=-7/4