Question

Determine o valor de x


a) 2x + 15 = 14



b) 2x - 3 = -2


c) 2x -10 = -8


d) 2x -15 = -14


e) 2x + 3 = 2


f) 2x + 10 = 8

Answer 1

A)2x+15=14 (Vamos passar o 15 para o outro lado, trocando o sinal)
2x=14-15
2x= -1
x=-0,5

B)2x-3=-2
2x=-2+3
2x= 1
x=0,5

C)2x-10=-8
2x=-8+10
2x=2
x=1

D)2x-15=-14
2x=-14+15
2x=1
x=0,5

E)2x+3=2
2x=2-3
2x=-1
x=-0,5

F)2x+10=8
2x=8-10
2x=-2
x=-1