solve each system firs by graphing, then using algebra. y=x+-7 and y+x=3

Answer 1

y=x-7

y=-x+3

graph them, they're two lines, looking like an "X" one going up, the other down. the upward sloping one with y intercept -7, the downward sloping one with y intercept 3

they intersect at y=-2, x= 5 (5,-2)

add the two equations

2y = -4

y =-4/2 =-2

plug that into either equation and solve for x

y=x-7

-2 =x-7

x =-2+7 = 5