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Simplifying 4x + -21 = 2x + -18 Reorder the terms: -21 + 4x = 2x + -18 Reorder the terms: -21 + 4x = -18 + 2x Solving -21 + 4x = -18 + 2x Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-2x' to each side of the equation. -21 + 4x + -2x = -18 + 2x + -2x Combine like terms: 4x + -2x = 2x -21 + 2x = -18 + 2x + -2x Combine like terms: 2x + -2x = 0 -21 + 2x = -18 + 0 -21 + 2x = -18 Add '21' to each side of the equation. -21 + 21 + 2x = -18 + 21 Combine like terms: -21 + 21 = 0 0 + 2x = -18 + 21 2x = -18 + 21 Combine like terms: -18 + 21 = 3 2x = 3 Divide each side by '2'. x = 1.5 Simplifying x = 1.5
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