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Math question

Ron sold 14 chocolate chip cookies and 2 ginger bread cookies total $116 bob sold 10 ginger bread cookies and 2 chocolate chip cookie totaling $104 how much for each cookie

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Andy C. | Math/Physics TutorMath/Physics Tutor
4.9 4.9 (19 lesson ratings) (19)
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14X+ 2Y = 116 ---> 7X + Y = 58
 
2X + 10Y = 104 ---> X +5Y = 52 ---> X = 52-5y
 
7(52-5y) + y = 58
 
364 - 35y + y = 58
 
 -34y = -306
 
y=9
 
 
x = 52 - 5(9) = 52 - 45 = 7
 
14(7) + 2(9) = 98 + 18 = 116
10(9) + 2(7) = 90 + 14  = 104