Question

Quais são as respostas desta equações?
A)2×+5-5×=1
B)5+6×=5×+2
C)×+2×-1-3=x

Answer 1

A) 2x+5-5x=1
-3x+5=1
-3x=1-5
-3x=-4
x=4/3

B)5+6x=5x+2
6x-5x=2-5
x=-3

C)x+2x-1-3=x
2x-1-3=0
2x-4=0
2x=4
x=4/2
x=2