1.

3x+7y=68 3x-y=4 in elimination

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Answer:

Given,

3X + 7y= 68

3x - y = 4

subtract 2 EQUATIONS

3x - 3x + 7y + y = 68 - 4

8y = 64

y = 8

substitute y VALUE in any of 2 equations

3x - 8 = 4

3x = 12

x = 4

values of x and y are 4 and 8 respectively



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