Question

Resolva as equações do 1 grau.
a) 3+x=1-x
b) 1/2+x=1/3-x
c) 5-4x=-2(x+3)

Answer 1

a-)

3+x=1-x
x+x=1-3
2x=-2
x=-2/2
x=-1

b-)

1/2+x=1/3-x
x+x=1/3-1/2
tira o MMC
2x=2-3 (os dois por /6)
x=-1/6/2
x=-1/6.2/1
x=-2/6

c-)

5-4x=-2(x+3)
5-4x=-2x-6
-4x+2x=-6-5 (-1)
4x-2x=6+5
2x=11
x=11/2

Vlw ;)