(-2,3) is where they intersect
Hope that helped
This doesn’t include the Einstein problem cause I didn’t have that one.
3x + y = 7
7 = 5x - 2y
THEN 3x + y = 5x - 2y ... it's like you're taking out the middle man "7"
50 cases of apples as 6x330=1980 and then 2 cases of bananas = 20 +1,980= 2,000