Penyelesaian dari 3(x
+ 1) - 5 = 13,
adalah. . . .
a. x = 5
b. x = 4
c. x = 3
d. x = 2
Penyelesaian :
3(x + 1) - 5 =
13
3(x + 1) - 5 = 13
3x + 3 -
5 =
13
3x - 2 = 13
3x - 2 + 2
= 13 + 2
3x = 15
x
= 15 : 3
x = 5