Solve the following equations.3x-y=7; x + 4y = 11 – InterviewSolution

1.

Solve the following equations.3x-y=7; x + 4y = 11

Answer»

3x - y = 7......(1)x + 4y = 11......(2)

Multiply eq(1) by 4 and add eq(2)12x - 4y = 28x + 4y = 11

13x = 39x = 36/13 = 3

Put value of x = 3 in eq(1)

3*3 - y = 79-7 = yy = 2

Value of x = 3, y = 2

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