Question

3x+4y=10,2x-2y=2 by elimantion method
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Answer 1

Step-by-step explanation:

multiply the both equations by 2 and 3.

2(3x+4y = 10 ) = 6x + 8y = 20 ------(i)

3( 2x - 2y = 2 ) = 6x - 6y = 6 ------(ii)

A.T.Q

$6x + 8y = 20 \\ 6x - 6y = 6 \\ - \: \: \: \: \: \: \: \: \: + \: \: \: \: \: \: - \\ 0 + 14y = 14 \\ y = \frac{14}{14} \\ y = 1$

Now , put the value of y in eq. (ii)

6x - 6y = 6

6x - 6 (1) = 6

6x = 6 + 6

6x = 12

x = 12/6

x = 2 ans.