Mr R coin bank consists of $10 bills and $5 bills only. if there 75 bills worth $ 450, how many $10 bills are there?
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Originally Posted by rcs Mr R coin bank consists of $10 bills and $5 bills only. if there 75 bills worth $ 450, how many $10 bills are there? x = number of $10 bills y = number of $5 bills now, you set up two equations from the given information ...
please correct me if im wrong: 10x + 5y = 450 75( x+ y) = 450
Originally Posted by rcs please correct me if im wrong: 10x + 5y = 450 this equation is ok ... 75( x+ y) = 450 this equation is incorrect ... x is the number of $10 bills , y is the number of $5 bills, the total number of bills is 75 ... fix it.
Originally Posted by skeeter ... fix it. 10x + 5y = 450 x + y = 75
Originally Posted by rcs 10x + 5y = 450 x + y = 75 good ... solve the system.
Originally Posted by skeeter good ... solve the system. thank you skeeter great Mentor!
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