Question

solve the following pairs of linear equations by all the three methods
x+y=7;3x-2y=11
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Answer 1

Answer:

Given x + y = 7 …(1)

and 3x - 2y = 11 …(2)

Form equation (1) we get y = 7 - x …(3)

Substituting value of y from equation (3) in (2), we get

3x - 2 (7 - x) = 11

implies 3x - 14 + 2x = 11

implies 5x - 14 = 11

implies 5x = 25 or x = 5

Substituting value of x in equation (3), we get

y = 7 - 5

implies y = 2 and x=5

Step-by-step explanation:

Answer 2

Answer:

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