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X + 3y = 1, -3x - 3y = -15 System of question
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X + 3y = 1, -3x - 3y = -15
System of question

User Mauricio Rodrigues
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1 Answer

3 votes

Explanation:


x + 3y = 1 \\ - 3x - 3y = - 15 \\ x = 1 - 3y \\ - 3(1 - 3y) - 3y = - 15 \\ - 3 + 9y - 3y = - 15 \\ - 3 + 6y = - 15 \\ 6y = - 15 + 3 \\ 6y = - 12 \\ y = - 2


y = - 2 \\x = 1 - 3y \\ x = 1 - 3( - 2) \\ x = 1 + 6 \\ x = 7

User Czarek
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