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Craig has 7 times as many baseball cards as Juan.
If Craig gives 18 baseball cards to Juan, the two children will have exactly the same amount.
How many baseball cards do they have altogether?
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x = # of Juan's cards;
7x = # of Craig cards.
Equation
7x - 18 = x + 18
Solution
7x - x = 18 + 18
6x = 36
x = 36/6 = 6.
ANSWER. Altogether, they have x + 7x = 8x = 6*8 = 48 cards.
Solved.