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Simplifying 3(x + -1) = 3x + -4x + 7 Reorder the terms: 3(-1 + x) = 3x + -4x + 7 (-1 * 3 + x * 3) = 3x + -4x + 7 (-3 + 3x) = 3x + -4x + 7 Reorder the terms: -3 + 3x = 7 + 3x + -4x Combine like terms: 3x + -4x = -1x -3 + 3x = 7 + -1x Solving -3 + 3x = 7 + -1x Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add 'x' to each side of the equation. -3 + 3x + x = 7 + -1x + x Combine like terms: 3x + x = 4x -3 + 4x = 7 + -1x + x Combine like terms: -1x + x = 0 -3 + 4x = 7 + 0 -3 + 4x = 7 Add '3' to each side of the equation. -3 + 3 + 4x = 7 + 3 Combine like terms: -3 + 3 = 0 0 + 4x = 7 + 3 4x = 7 + 3 Combine like terms: 7 + 3 = 10 4x = 10 Divide each side by '4'. x = 2.5 Simplifying x = 2.5
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