the solution to 5x-5=-10 7x-2y+4=6 3x+2y=-82
I'm not sure what to do with the first equation.
5x - 5 = -10
5x = -10 + 5 = -5
x = -5 / 5 = -1
If that identifies a line, it is a vertical line located one step to the left
of the y axis.
However, the two remaining equations can be solved simultaneously.
Equation 2:
7x-2y+4=6
7x - 2y = 2
Now, we add equation two and equation three to eliminate the y term:
7x - 2y = 2
3x + 2y = -82
-------------------
10x = -80
10x = -80
x = -8
With that, we can use equation three to solve for y:
3 * (-8) + 2y = -82
-24 + 2y = -82
2y = -28
y = -24
You can verify by using equation two, but what we have
is a point where two straight lines, specified by equations
two and three, intersect on a graph.
(-8, -24)