Answer:
(31, 2); Substitution.
Step-by-step explanation:
x - 3y = 25
Use SUBSTITUTION by setting everything in the above equation equal to x...
x = 3y + 25
2(3y +25) + y = 64
6y + 50 + y = 64
7y + 50 (-50) = 64 (-50)
7y = 14
y = 2
Then, substitute y = 2 into the original equation.
x - 3(2) = 25
x - 6 = 25
x = 31
(x, y) = (31, 2)
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