Question

(1) 3x - 4y = 10 ; 4x + 3y = 5​

Answer 1

Answer:

$x = 2 \: \: \: \: \: and \: \: \: y = - 1.$

Step-by-step explanation:

$3x - 4y = 10 \\ \\ 4x + 3y = 5 \\ \\ solving \: we \: get \\ \\ 4(3x - 4y) - 3(4x + 3y) = 40 - 15 \\ \\ - 16y - 9y = 25 \\ \\ y = - 1 \\ \\ and \: on \: substituting \: again \: we \: get \\ \\ 3x + 4 = 10 \\ \\ 3x = 6 \\ \\ x = 2.$