Expanding the left side of the equation:
-6(x + 3) + x = -6x + 30
Distributing the -6 to both terms inside the parenthesis:
-6x - 18 + x = -6x + 30
Combining like terms on the left side:
-5x - 18 = -6x + 30
Adding 5x to both sides:
-18 = -x + 30
Subtracting 30 from both sides:
-48 = -x
Multiplying both sides by -1 to solve for x:
48 = x
-6(x + 3) +x = -6x + 30
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