Math, asked by aroobanayum, 4 months ago

The cost of a pencil is 25 cents more than the cost of a eraser. If the cost of 8 pencils and 10 erasers is

$12.80, find the cost of each.(Use Cramer’s Rule)​

Answers

Answered by lol1172
1

Answer:

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Attachments:
Answered by akshayanand2104
2

Answer:

Cost of an Eraser=x=60

Cost of a pencil=25+x=85

Step-by-step explanation:

Pencil

25+x  

Eraser

x

8(25+x)+10x=1280. [1 dollars = 100 cents]

[12.80 dollars=1280 cents]

=200+8x+10x=1280

=200+18x=1280

=18x=1280-200

=18x=1080

x=1080÷18

x=60

Cost of an Eraser=x=60

Cost of a pencil=25+x=85

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