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Simplifying 12x + -21 = 28(4x + -1) Reorder the terms: -21 + 12x = 28(4x + -1) Reorder the terms: -21 + 12x = 28(-1 + 4x) -21 + 12x = (-1 * 28 + 4x * 28) -21 + 12x = (-28 + 112x) Solving -21 + 12x = -28 + 112x Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-112x' to each side of the equation. -21 + 12x + -112x = -28 + 112x + -112x Combine like terms: 12x + -112x = -100x -21 + -100x = -28 + 112x + -112x Combine like terms: 112x + -112x = 0 -21 + -100x = -28 + 0 -21 + -100x = -28 Add '21' to each side of the equation. -21 + 21 + -100x = -28 + 21 Combine like terms: -21 + 21 = 0 0 + -100x = -28 + 21 -100x = -28 + 21 Combine like terms: -28 + 21 = -7 -100x = -7 Divide each side by '-100'. x = 0.07 Simplifying x = 0.07
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