Question

$x+2y \: = 25 \\ 3x + 4y = 75$
solve the simultaneous equation ​

Answer 1

Step-by-step explanation:

$x + 2y = 25 \\ or \: 3x + 6y = 75.........(1) \\ \\ 3x + 4y = 75.......(2) \\ \\ (1) - (2) \\ 3x - 3x + 6y - 4y = 75 - 75 \\ or \: 2y = 0 \\ or \: y = 0 \\ \\ x = 25$