Question

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.
a $x + 4 = 12$, jenny needs 8 more barbie dolls
b $4x = 12$, jenny needs 3 more barbie dolls
c $x - 4 = 12$, jenny needs 16 more barbie dolls
d $x + 12 = 4$, jenny needs 8 more barbie dolls

Explanation:

Step1: Define variable and equation

Let $x$ = number of dolls needed. Total = current + needed: $4 + x = 12$

Step2: Isolate $x$ (subtract 4)

$x = 12 - 4$

Step3: Calculate the value

$x = 8$

Answer:

A. $x + 4 = 12$, Jenny needs 8 more barbie dolls.