Jenny wants a total of 12 barbie dolls by the time she is 9 years old. Right now she has 4 barbie dolls. How many more does she need?
Write an equation and solve.
Responses
A x - 4 = 12; Jenny needs 16 more barbie dolls.x - 4 = 12; Jenny needs 16 more barbie dolls.
B 4x = 12; Jenny needs 3 more barbie dolls.4 x = 12; Jenny needs 3 more barbie dolls.
C x + 4 = 12; Jenny needs 8 more barbie dolls.x + 4 = 12; Jenny needs 8 more barbie dolls.
D x + 12 = 4; Jenny needs 8 more barbie dolls.
C x - 4 = 12; Jenny needs 8 more barbie dolls.
To solve, we need to isolate x (the number of additional barbie dolls Jenny needs).
Adding 4 to both sides of the equation:
x - 4 + 4 = 12 + 4
x = 16
Therefore, Jenny needs 8 more barbie dolls (since she already has 4) to reach her goal of 12.