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26 votes
26 votes
How many folders and how many notebooks did he buy

How many folders and how many notebooks did he buy-example-1
User Vladimir Samsonov
by
2.9k points

1 Answer

11 votes
11 votes

we have the system

f+n=8 -----> f=8-n -----> equation 1

0.5f+1.5n=6 -----> equation 2

Solve the system of equations

Substitute equation 1 in equation 2

0.5(8-n)+1.5n=6

solve for n

4-0.5n+1.5n=6

n=6-4

n=2

Find out the value of f

f=8-n

f=8-2

f=6

therefore

6 folders

2 notebooks

User Aniruddh Ambarkar
by
2.6k points