Question

7x+3y=15;12y-5x=39 solve the equation by creamers method
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Answer 1

Answer:

3y + 7x = 15..............(i)×4

12y + 28x = 60.

12y - 5x = 39.............(ii)

Adding(i) and (ii) we get,

12y + 28x = 60.

12y - 5x = 39. - + -

0 + 33x = 21

x = 21 .

33

x = 7

11

then by putting the value of x in (i) equation we get,

3y+7× 7 = 15.

11

=> 3y = 15-49

11

=> 3y = 165 - 49

11

=> 3y = 116

11

=> y = 116 × 1

11 3

=> y = 116.

33

.

. . x = 7 and y = 116

11 33

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