Question 1015677
5x - 2y = -15 Multiply times 3
3x + 3y = 12  Multiply times 2
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15x-6y = -45
+
6x+6y = 24
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21x = -21 Divide both sides by 21
x = -21/21= -1
Now you can find y:
5x-2y = -15
5(-1)-2y = -15
-5-2y = -15
-2y = -10 Divide both sides by -2, and remember -/- = +
y = 5
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Now you can check your results:
5x - 2y = -15, 5(-1)-2(5)= -15, -5-10 = -15 Correct
3x + 3y = 12, 3(-1)+3(5) = 12, -3+15 = 12 Also correct
J