Question 834443: 10 years from now, Lisa will be 3 times the age she was 6 years ago.What is her present age? Found 2 solutions by JulietG, jgr45:Answer by JulietG(1812) (Show Source):
You can put this solution on YOUR website! L + 10 = 3 (L - 6)
Distribute the L
L+10 = 3L - 18
Add 18 to each side
L + 28 = 3L
Subtract L from each side
28 = 2L
Divide by 2
14 = L
.
Let's make sure it works.
10 years from now, Lisa will be (14+10=24) - is that 3 times the age she was 6 years ago? 6 years ago, she was 14-6=8. 8*3 = 24
Success!
You can put this solution on YOUR website! Let x = present age
age 6 years ago = x - 6
age 10 years hence = x + 10
Ten years from now her age will be triple what it was six years ago:
x + 10 = 3(x - 6)
3x - 18 = x + 10
3x = x + 28
2x = 28
x = 14; She is age 14 at present.
Check:
14 + 10 =? 3 (14-6)
24 =? 3(8)
24 = 24
