System of equations-4× 7y=-8-5× 6y=1

-4x + 7y = -8 . . . (1)
-5x + 6y = 1 . . . .(2)

(1) x 5 => -20x + 35y = -40 . . . (3)
(2) x 4 => -20x + 24y = 4 . . . . .(4)

(3) - (4) => 11y = -44 => y = -44/11 = -4
From (2), -5x + 6(-4) = 1 => -5x - 24 = 1 => -5x = 1 + 24 = 25 => x = 25/-5 = -5

Therefore, x = -5, y = -4

Marcelina spends the intended amount of money and buys more than the intended amount of corn.

Step-by-step explanation:

The equation in the green shows the amount that Marcelina actually spent.

The equation in the blue shows what she planned on spending. In the problem, it says that she needs to buy 50kg of corn in total, but when she spends the amount that she intended, she ended up getting more than what she needed, which was 50kg or corn.