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Simplifying 7 + 8x + -16 = 21x + -21 + 2x Reorder the terms: 7 + -16 + 8x = 21x + -21 + 2x Combine like terms: 7 + -16 = -9 -9 + 8x = 21x + -21 + 2x Reorder the terms: -9 + 8x = -21 + 21x + 2x Combine like terms: 21x + 2x = 23x -9 + 8x = -21 + 23x Solving -9 + 8x = -21 + 23x Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-23x' to each side of the equation. -9 + 8x + -23x = -21 + 23x + -23x Combine like terms: 8x + -23x = -15x -9 + -15x = -21 + 23x + -23x Combine like terms: 23x + -23x = 0 -9 + -15x = -21 + 0 -9 + -15x = -21 Add '9' to each side of the equation. -9 + 9 + -15x = -21 + 9 Combine like terms: -9 + 9 = 0 0 + -15x = -21 + 9 -15x = -21 + 9 Combine like terms: -21 + 9 = -12 -15x = -12 Divide each side by '-15'. x = 0.8 Simplifying x = 0.8
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