Question

3x+4y -12. 4x+3y-37​

Answer 1

Answer:

$using \: \: \: \: elimination \: \: \: \: method \: \\ 3x + 4y = 12 - - - - (1) \\ 4x + 3y = 37 - - - - (2) \\ multiplying \: eq \: (1) \: by \: 4 \\ 4(3x + 4y) = 4(12) \\ 12x + 16y = 48 - - - (3) \\ multiplying \: eq \: (2) \: by \: 3 \\ 3(4x + 3y) = 3(37) \\ 12x + 9y = 111 - - - (4) \\ subtracting \: \: eq(3) \: \: and \: \:( 4) \\ 12x + 16y = 48 \\ 12x + 9y = 111 \\ - \: \: \: - \: \: - \: \: \: \: \: \: \: \\ 7y = - 63 \\ y = \frac{ - 63}{7} \\ y = 9 \\ put \: \: the \: \: value \: \: of \: \: y \: \: in \: \: eq \: \: (1) \\ 3x + 4 \times 9 = 12 \\ 3x + 36 = 12 \\ 3x = 12 - 36 \\ 3x = - 24 \\ x = \frac{ - 24}{3} \\ x = - 8$

I hope it will help you