Solve for x and y: x – 3y – 7 = 0; 3x – 3y = 15.
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Answer:
x = 4
y = -1
Step-by-step explanation:
From first equation we can find out the value of x
x - 3y = 7
x = 7 + 3y
put the value of x in second equation
3(7+3y) ‐ 3y = 15
21 + 9y - 3y = 15
6y = 15 - 21
6y = -6
y = -1
put the value of y in first equation
x - 3(-1) = 7
x + 3 = 7
x = 4
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