SOLUTION: 2 pencils + 3 pens cost $18.80 and 6 pencils and 6 pens is $45. What is the cost of 1 pen? How much more do pens cost? I'm not sure how to set this up. 2x+3y=18.80 & 6x+6y=45
But
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Expressions-with-variables
-> SOLUTION: 2 pencils + 3 pens cost $18.80 and 6 pencils and 6 pens is $45. What is the cost of 1 pen? How much more do pens cost? I'm not sure how to set this up. 2x+3y=18.80 & 6x+6y=45
But
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Question 807768: 2 pencils + 3 pens cost $18.80 and 6 pencils and 6 pens is $45. What is the cost of 1 pen? How much more do pens cost? I'm not sure how to set this up. 2x+3y=18.80 & 6x+6y=45
But at this point I don't know what to do next. Answer by richwmiller(17219) (Show Source):
You can put this solution on YOUR website! 2x+3y=18.80
6x+6y=45
either multiply the first by 2 (To eliminate y's) or the first by 3 (to eliminate4 x's)
let multiply by two and eliminate y's
6x+6y=45
4x+6y=37.60
subtract
2x=7.40
x=3.70
7.40+3y=18.80
3y=11.40
y=3.80
