Question

Solve the following pair of the liner equation by the elimination method: 3x+2y=11 and 2x+2y=4​

Answer 1

Given:

1. 3x+2y= 11 -eq1
2. 2x+2y= 4 -eq2

subtracting eq2 from eq1 :

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

=> 3x-2x+2y-2y = 7

=> x = 7

substituting the value of x in eq2 :

2(7)+2(y) = 4

=> 14+2y= 4

=> 2y = -10

=> y = -5

so the value of x = 7

value if y = -5

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