Question 284345
y=3x+7
x+2y=-10
plug 3x+7 in for y in the second equation
x+2*(3x+7)=-10
solve for x
x+6x+14=-10
7x=-24
x=-24/7

-24/7+2y=-10
add 10
10-24/7=-2y
divide by -2
-5+12/7=y
-35/7+12/7=y
-23/7=y
x=-24/7
strange answers but correct
they intersect at (-24/7,-23/7)