Solve the problem.
-Mary and her brother John collect foreign coins. Mary has four times the number of coins that John has. Together they have 150 foreign coins. Find how many coins Mary has.
A)24 coins
B)120 coins
C)114 coins
D)30 coins

Question

Quizplus · Accepted Answer

Mary has 120 coins. If Mary has four times the number of coins John has, let's denote John's coins as x. Therefore, Mary's coins are 4x. Together, they have x + 4x = 5x = 150 coins. Solving for x gives x = 30 (John's coins), so Mary has 4x = 4*30 = 120 coins.

Solve the Problem. -Mary and Her Brother John Collect Foreign Coins. Mary Has