Word Problem: Judy has 20 dolls
judy has 20 dolls
janice buys one more doll; janice has twice as many dolls as judy now
how many dolls does janice have?
Identify Judy as x
Identify Janice as y
x = 20
y + 1 = 2x
y + 1 = 2(20)
y + 1 = 40
y = 40 - 1
y = 39
Before buying one more doll, Janice has 39 dolls.
After buying one more doll, Janice has 40 dolls.