There are two classrooms A and B. If 15 students are sent from A to B, then the number of students in each classroom will be the same. If 5 students are sent from B to A, then the number of students in A will be double the number of students in B. Represent this information algebraically.
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A-15=B+15
2(B-5)=A+5
from 1
A=B+15+15
A=B+30
substitute in 2
2(B-5)=(B+30)+5
2B-10=B+30+5
2B-B=35+10
B=45
we know That:
A=B+30
A=45+30
A=75
2(B-5)=A+5
from 1
A=B+15+15
A=B+30
substitute in 2
2(B-5)=(B+30)+5
2B-10=B+30+5
2B-B=35+10
B=45
we know That:
A=B+30
A=45+30
A=75
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