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Simplifying 7(x + -3) + 4x = -4x + -12 Reorder the terms: 7(-3 + x) + 4x = -4x + -12 (-3 * 7 + x * 7) + 4x = -4x + -12 (-21 + 7x) + 4x = -4x + -12 Combine like terms: 7x + 4x = 11x -21 + 11x = -4x + -12 Reorder the terms: -21 + 11x = -12 + -4x Solving -21 + 11x = -12 + -4x Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '4x' to each side of the equation. -21 + 11x + 4x = -12 + -4x + 4x Combine like terms: 11x + 4x = 15x -21 + 15x = -12 + -4x + 4x Combine like terms: -4x + 4x = 0 -21 + 15x = -12 + 0 -21 + 15x = -12 Add '21' to each side of the equation. -21 + 21 + 15x = -12 + 21 Combine like terms: -21 + 21 = 0 0 + 15x = -12 + 21 15x = -12 + 21 Combine like terms: -12 + 21 = 9 15x = 9 Divide each side by '15'. x = 0.6 Simplifying x = 0.6
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