h2xamEmsNurury h2xamEmsNurury

28-01-2016
Mathematics

Answered

The cost of three boxes of envelopes and four boxes of notebooks paper is $13.25 2 boxes of envelopes and six boxes of notebook paper cost $17 find the cost of each

Verified Answer :

Dani667 Dani667

28-01-2016

y = envelopes x = notebook paper
-2(4x + 3y = 13.25)
3(6x + 2y = 17)
-8x - 6y = - 26.5
18x + 6y = 51
10x = 24.5
x = 2.45
4(2.45) + 3y = 13.25
9.8 + 3y = 13.25
-9.8 -9.8
3y = 3.45
y = 1.15 envelopes = $1.15 notebook paper = $2.45

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