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Simplifying -18x + -5(2x + -2) = 21x + 4 Reorder the terms: -18x + -5(-2 + 2x) = 21x + 4 -18x + (-2 * -5 + 2x * -5) = 21x + 4 -18x + (10 + -10x) = 21x + 4 Reorder the terms: 10 + -18x + -10x = 21x + 4 Combine like terms: -18x + -10x = -28x 10 + -28x = 21x + 4 Reorder the terms: 10 + -28x = 4 + 21x Solving 10 + -28x = 4 + 21x Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-21x' to each side of the equation. 10 + -28x + -21x = 4 + 21x + -21x Combine like terms: -28x + -21x = -49x 10 + -49x = 4 + 21x + -21x Combine like terms: 21x + -21x = 0 10 + -49x = 4 + 0 10 + -49x = 4 Add '-10' to each side of the equation. 10 + -10 + -49x = 4 + -10 Combine like terms: 10 + -10 = 0 0 + -49x = 4 + -10 -49x = 4 + -10 Combine like terms: 4 + -10 = -6 -49x = -6 Divide each side by '-49'. x = 0.1224489796 Simplifying x = 0.1224489796
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