An algebra problem by Michael Jeff Mamigo
Algebra
Level
2
Sandra is 18 years older than Paulo. In 13 years, Sandra's age will be twice of Paulo's age. How old is Sandra now?
The answer is 23.
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1 solution
Sandra=S, Paulo=P
S = P + 18
S + 13 = 2 (P+13)
(P+18) + 13 = 2P + 26
P=5 S=23