Question

2x+3y=45,3x+6y=78,solution

Answer 1

$2x + 3y = 45 \: \: \: \: \: (1) \\ 3x + 6y = 78 \: \: \: \: \: \: (2) \\ (1) \times 2 \\ 4x + 6y = 90 \: \: \: \: \: ( 3) \\ (3) - (2) \\ x = 12 \\ substituting \: this \: in \: eq \: (1) \\ 2(12) + 3y = 45 \\ 24 + 3y = 45 \\ 3y = 21 \\ y = 7$

Therefore x = 12 & y = 7

Answer 2

Ur answer is in attachment..

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