SOLUTION: elena is 6 years younger than her brother.the sum of their ages is 30 how old is elena oh you have to guess and test

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Question 786658: elena is 6 years younger than her brother.the sum of their ages is 30 how old is elena oh you have to guess and test
Answer by wilft1(217) About Me  (Show Source):
You can put this solution on YOUR website!
guess and test all you want, the formula for this would be
x + x - 6 = 30
add 6 to both sides
x + x = 36
combine like terms
2x = 36
divide by 2
x = 18
x - 6 = 12
elena is 12 and her brother is 18