Question

4704=67x+70y ,where x+y=69
find x$y
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Answer 1

Answer:

x = 42. y = 27.

Step-by-step explanation:

67x + 70y = 4704 let this be equation 1.

x + y = 69 let this be equation 2.

multiple 67 to equation 2

67x + 67y = 4623 let this be equation 3.

subtract equation 3 from equation 1

67x + 70y - 67x - 67y = 4704 - 4623

3y = 81

y = 27

substitute y = 27 in equation 2

x + y = 69

x + 27 = 69

x = 69 - 27

x = 42.