Respuesta :

22stolc

Answer:

The value of x is 2. The value of y is -1. So, x-y = 2-(-1) = 3

Step-by-step explanation:

I graphed the equations on the graph below to find the solutions for x and y.

Ver imagen 22stolc

Answer: x=2 and y=-1

Step-by-step explanation:

the two equations are:

5x+2y=8

3x-7y=13

using the first equation find y:

y=4-2.5x

substitute into 2nd equation:

3x-7(4-2.5x)=13

solve:

3x-28+17.5x=13

20.5x=41

x=2

solve y by plugging in to an equation:

y=4-2.5*2

y=4-5

y=-1