SOLUTION: Tom is 4 more than twice Andrews age. Sarah is 8 less than 5 times Andrews age. If tom and sarah are twins how old is andrew

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Question 908081: Tom is 4 more than twice Andrews age. Sarah is 8 less than 5 times Andrews age. If tom and sarah are twins how old is andrew
Answer by JulietG(1812) About Me  (Show Source):
You can put this solution on YOUR website!
T = 4 + 2A
S = 5A - 8
T = S
Since T and S are equal, set them against each other
2A + 4 = 5A - 8
Subtract 2A from each side, and add 8 to each side
12 = 3A
Divide each side by 3
A = 4
If Andrew is 4, then Tom is twice that plus 4, or 12. Sarah is 5 times 4 less 8, or 12.