Thank you for the opportunity to help you with your question!
6x+3y=27 x 2 = 12x + 6y = 54
-4x+7y=27 x 3 = -12x + 21y = 81
on adding both the equations, x gets eliminated.
we get: 27 y = 135
so y =5
and putting in equation 1, x = 2
so x = 2
y = 5
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