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Each pen costs 3 times as much as each eraser . If the total cost of two pens and four erasers is 6.30 , find the cost of each pen.
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Each pen costs 3 times as much as each eraser . If the total cost of two pens and four erasers is 6.30 , find the cost of each pen.
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Apr 28, 2018
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Each pen costs 3 times as much as each eraser . If the total cost of two pens and four erasers is 6.30 , find the cost of each pen.
Mathematics
middle-school
Moojjoo
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x is the cost of the eraser.
2(3x) + 4x = 6.30
10x = 6.30 ~ Divide each side by 10.
x = 0.63
Then multiply 0.63 by 3 to get the cost of the pen which is
0.63 x 3 = $1.89
The cost of each pen is $1.89
The cost of each eraser is 0.63 cents.
RajSharma
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May 2, 2018
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