SOLUTION: Issac is 78 years younger than Tatiana. 8 years ago Tatiana was 4 times Issac's age. how old is Issac now

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Question 1064551: Issac is 78 years younger than Tatiana. 8 years ago Tatiana was 4 times Issac's age. how old is Issac now
Found 2 solutions by josgarithmetic, MathTherapy:
Answer by josgarithmetic(39620) About Me  (Show Source):
You can put this solution on YOUR website!
i, Isaac
t, Tatiana
system%28i=t-78%2Ct-8=4%28i-8%29%29

t-8=4%28t-78-8%29
t-8=4%28t-86%29
t-8=4t-4%2A86
-8%2B4%2A86=3t
3t=336
t=112
-
highlight%28i=34%29

Answer by MathTherapy(10553) About Me  (Show Source):
You can put this solution on YOUR website!
Issac is 78 years younger than Tatiana. 8 years ago Tatiana was 4 times Issac's age. how old is Issac now
Let Isaac's (I'll use Isaac) age be I

Then Tatiana's is: I + 78

We then get the following AGE equation for Isaac: I + 78 - 8 = 4(I - 8)

I + 70 = 4I - 32

I - 4I = - 32 - 70

- 3I = - 102

I, or Isaac is: highlight_green%28matrix%281%2C4%2C+%28-+102%29%2F%28-+3%29%2C+or%2C+34%2C+years-old%29%29