The standard form of linear equation is Ax + By = C, where A and B are ≠ 0, and A is positive.
Start by distributing -3 into the parenthesis:
y + 6 = -3(x + 1)
y + 6 = -3x - 1
Subtract 6 from both sides:
y + 6 - 6 = -3x - 1 - 6
y = -3x - 7
Then, add 3x to both sides:
3x + y = -7 ( This is the standard equation where a = 3, b = 1, and c = -7.)
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