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7x + 5y = 32

- 3x + y = - 20

from the system of equations above, we can eliminate y by multiplying the first equation by 1 and the second equation by 5 and then we subtract the 2 equations.

to find the value of y, we eliminate x form the equation. this is by multiplying the first equation by 3 and the second equation by 7 and then adding the 2 equations.