Question

Help 10points reward

Answer 1

I think its 15

Explanation:

Answer 2

`x = 10 \\ y = 15`

Explanation:

`5x - 4y = - 10 \: \: \: \: \: \: \: ...(1) \\ y = 2x - 5 \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: ...(2)`

`5x - 4(2x - 5) = - 10 \\ 5x - 8x + 20 = - 10 \\ - 3x = - 10 - 20 \\ - 3x = - 30 \\ 3x = 30 \\ \\ x = (30)/(3) \\ \\ x = 10`

put, x = 10 in equation (2)

`y = 2(10) - 5 \\ y = 20 - 5 \\ y = 15`