Saturday

February 28, 2015

February 28, 2015

Posted by **kia** on Thursday, January 25, 2007 at 9:39pm.

well how old is your sister

You are 9 and she is 3 (3x3=9)

Last year you were 8 and she was 2

(2x4=8)

your sister is 3 and you are 9

let x = sister's age

and y = your age.

================

last year sister's age was x-1.

last year your age was y-1.

y = 3x for this year.

y-1 = 4(x-1) for last year.

solve for x and y.

The answers above are correct but this tells you how to do it.

**Answer this Question**

**Related Questions**

4th grade math - Rodney is three times as old as his sister. Ayear ago he was ...

math - Rodney is 3 times as old as his sister. A year ago, he was 4 times as old...

Algebra II - Sue is three times as old as her sister. In one year from now, ...

math - A. John is now 10 years older than Marcus. Three times John's age 5 years...

math - i never can do word problems....please help... i got 7 of them.....these ...

9th grade math word problems - i never can do word problems....please help... i ...

math - laura is half as old as kevin. five years ago he was 3 times as old as ...

math 4th grade question - Rodney is 3 times as old as his sister.A year ago, he ...

BrainMath - Hector is 12 years old now. In 4 years he will be twice as old as ...

algebra - A dad is now three times as old as his son, but in eleven years the ...