2. Calcule o valor de x.
a) 5x + 5 = 20
b) 2x + 3 = 13
c) 10x + 10 = 40
d) 2x - 3 = 17
a) 5x + 5 = 20
b) 2x + 3 = 13
c) 10x + 10 = 40
d) 2x - 3 = 17
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B) 2x + 3 = 13 -> 13 - 2x = 3 -> x = 5
C) 10x + 10 = 40 -> 40 - 10x = 10 -> 10x = 30 -> x = 3
D) 2x - 3 = 17 -> 17 + 3 = 2x -> 2x = 20 -> x = 10
Verified answer
Resposta:
A) 5x= -5 + 20
5x= 15
x= 15
5
x= 3
B) 2x= -3+13
2x= 10
x= 10
2
X= 5
C) 10x= -10+40
10x= 30
x= 30
10
x= 3
D) 2x= 3+17
2x= 20
X= 20
2
X= 10