Question

$3x - 4y = 10 : 4x + 3y = 5$
what is the answer?​

Answer 1

Answer:

Hi there, here we have

$3x-4y=10\\4x+3y=5$

So,

$3(3x-4y = 10)\\4(4x+3y=5)\\\\9x-12=30\\16x+12y=20\\\\Add\\\\9x+16x+12y-12y=30+20\\\\=>25x+0=50\\=>x=\frac{50}{25}\\=>x=2$

So, x = 2

Now we need to find y.

$3(2)-4y=10\\=>6-4y=10\\=>6=10+4y\\=>4y=6-10\\=>4y=-4\\=>y=-1$

So, we found x = 2 and y = -1

Hope this helps you,

All the best..