ALGEBRA
posted by LEE on .
SUZY IS 10 YEARS OLDER THAN BILLY, AND NEXT YEAR SHE WILL BE TWICE AS OLD AS BILLY. HOW OLD IS SUZY NOW? HOW OLD IS BILLY?

S10=B
S+1=2(B+1)
subtract the second equation from the first..
11=b2
b=9
S=19
posted by LEE on .
SUZY IS 10 YEARS OLDER THAN BILLY, AND NEXT YEAR SHE WILL BE TWICE AS OLD AS BILLY. HOW OLD IS SUZY NOW? HOW OLD IS BILLY?
S10=B
S+1=2(B+1)
subtract the second equation from the first..
11=b2
b=9
S=19