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Simplifying 8.7 = -7x + -21.3 Reorder the terms: 8.7 = -21.3 + -7x Solving 8.7 = -21.3 + -7x Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '7x' to each side of the equation. 8.7 + 7x = -21.3 + -7x + 7x Combine like terms: -7x + 7x = 0 8.7 + 7x = -21.3 + 0 8.7 + 7x = -21.3 Add '-8.7' to each side of the equation. 8.7 + -8.7 + 7x = -21.3 + -8.7 Combine like terms: 8.7 + -8.7 = 0.0 0.0 + 7x = -21.3 + -8.7 7x = -21.3 + -8.7 Combine like terms: -21.3 + -8.7 = -30 7x = -30 Divide each side by '7'. x = -4.285714286 Simplifying x = -4.285714286
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