some examples.Example 7: Solve the following pair of equations by subs – InterviewSolution

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some examples.Example 7: Solve the following pair of equations by substitution method:7x-15y = 2x+2y = 3

Answer»

7x - 15y = 2......(1)x + 2y = 3.........(2) x = 3-2y

Put value of x from eq (2) in eq(1)7(3-2y) - 15y = 221 - 14y - 15y = 219y = 19y = 1

From eq(2)x = 3-2y = 3-2*1 = 3-2 = 1

Value of x = 1, y = 1

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