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Simplifying 8.86 + -21x = 6.4 + -2(x + -18) Reorder the terms: 8.86 + -21x = 6.4 + -2(-18 + x) 8.86 + -21x = 6.4 + (-18 * -2 + x * -2) 8.86 + -21x = 6.4 + (36 + -2x) Combine like terms: 6.4 + 36 = 42.4 8.86 + -21x = 42.4 + -2x Solving 8.86 + -21x = 42.4 + -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. 8.86 + -21x + 2x = 42.4 + -2x + 2x Combine like terms: -21x + 2x = -19x 8.86 + -19x = 42.4 + -2x + 2x Combine like terms: -2x + 2x = 0 8.86 + -19x = 42.4 + 0 8.86 + -19x = 42.4 Add '-8.86' to each side of the equation. 8.86 + -8.86 + -19x = 42.4 + -8.86 Combine like terms: 8.86 + -8.86 = 0.00 0.00 + -19x = 42.4 + -8.86 -19x = 42.4 + -8.86 Combine like terms: 42.4 + -8.86 = 33.54 -19x = 33.54 Divide each side by '-19'. x = -1.765263158 Simplifying x = -1.765263158
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