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Simplifying 3(x + -7) = -3x + 7 Reorder the terms: 3(-7 + x) = -3x + 7 (-7 * 3 + x * 3) = -3x + 7 (-21 + 3x) = -3x + 7 Reorder the terms: -21 + 3x = 7 + -3x Solving -21 + 3x = 7 + -3x Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '3x' to each side of the equation. -21 + 3x + 3x = 7 + -3x + 3x Combine like terms: 3x + 3x = 6x -21 + 6x = 7 + -3x + 3x Combine like terms: -3x + 3x = 0 -21 + 6x = 7 + 0 -21 + 6x = 7 Add '21' to each side of the equation. -21 + 21 + 6x = 7 + 21 Combine like terms: -21 + 21 = 0 0 + 6x = 7 + 21 6x = 7 + 21 Combine like terms: 7 + 21 = 28 6x = 28 Divide each side by '6'. x = 4.666666667 Simplifying x = 4.666666667
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