math
posted by kim on .
Barb has twice as many books as Lisa. Mike has 25 more books than Lisa, but 15 fewer than Barb. How many books each student has?

B=2L
M=L+25
M=B15
so
L+25=B15
B/2+25=B15
B/2=10
B=20 I assume you can finish
posted by kim on .
Barb has twice as many books as Lisa. Mike has 25 more books than Lisa, but 15 fewer than Barb. How many books each student has?
B=2L
M=L+25
M=B15
so
L+25=B15
B/2+25=B15
B/2=10
B=20 I assume you can finish