Question

Solve the following systems of equations 'ELIMINATION BY SUBSTITUTION' method and find the value of 2x + y

$2.) \: 4x + \frac{6}{y} = 15$
;

$3x - \frac{4}{y} = 7$
, y # 0


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Answer 1

$\mathbf{hence \: \: } \\ \\ \\ \mathbf{ \fcolorbox{blue}{lime}{ (2x + y) = 2(3) + 2 }}$


=> 6 + 2

=> 8