Question

cost of a pencil is 25 cents more than the cost of eraser. if the cost of 8 pencils and 10 erasers is 12.80. find the cost of each​

Answer 1

Step-by-step explanation:

Pencil Eraser

25+x x

8(25+x)+10x=1280 [ 1 doller=100 cent

12.80 doller=1280 cent

200+8x+10x=1280

200+18x=1280

18x=1280-200

18x=1080

X=1080/18

X=60

Cost of a eraser= x = 60

Cost of a pencil= 25+x=85

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Answer 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