Question

Equação do 1ª grau
A) x-3=5-3x
B) 10x=20-x
C) x+5=5
D) 8y=-8+4y
E) x+5=2x-5

Answer 1

A) x=2
B) x=20/11
C) x=0
D) y= -2
E) x= 10

Answer 2

A) x-3=5-3x
x+3x=5+3
4x=8
x=2

B)10x=20-x
10x+x=20
11x=20
x=1,818181...

C)x+5=5
x=5-5
x=0

D)8y=-8+4y
8y-4y=-8
4y=-8
y=-2

E)x+5=2x-5
x-2x=-5-5
-x=-10 .(-1)
x=10