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Ted is 12 years younger than Francisco. Francisco is 3 times as old as ted. How old is Francisco

User JToland
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1 Answer

7 votes

Answer:

Francisco is 18

Explanation:

call Ted T and Francisco F.

T is 12 years younger than F. So, T = F -12. (call this equation 1)

F is 3 times as old. So, F = 3T (call this equation 2).

sub equation 2 into equation 1:

T= F - 12

= 3T - 12.

So, T = 3T -12

subtract T from both sides:

0 = 3T - T - 12.

Add 12 to both sides:

3T - T = 12

2T = 12

T = 6.

Ted is 6.

Francisco is 3 times as old. So, Francisco is 3 X 6 = 18.

User Obcure
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