SOLUTION: My age and my grandmother's age differ by fifty years. Nine times my age decreased by triple her age is equal to (-60). How old were each of us last year?
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Question 1173014: My age and my grandmother's age differ by fifty years. Nine times my age decreased by triple her age is equal to (-60). How old were each of us last year?
Answer by VFBundy(438) (Show Source): You can put this solution on YOUR website!
My present age = x
My grandmother's present age = x + 50
9x - 3(x + 50) = -60
9x - 3x - 150 = -60
6x = 90
x = 15
My present age = x = 15
My grandmother's present age = x + 50 = 15 + 50 = 65
My age last year = 15 - 1 = 14
My grandmother's age last year = 65 - 1 = 64
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