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Simplifying 21 = x + 1.15x Combine like terms: x + 1.15x = 2.15x 21 = 2.15x Solving 21 = 2.15x Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-2.15x' to each side of the equation. 21 + -2.15x = 2.15x + -2.15x Combine like terms: 2.15x + -2.15x = 0.00 21 + -2.15x = 0.00 Add '-21' to each side of the equation. 21 + -21 + -2.15x = 0.00 + -21 Combine like terms: 21 + -21 = 0 0 + -2.15x = 0.00 + -21 -2.15x = 0.00 + -21 Combine like terms: 0.00 + -21 = -21 -2.15x = -21 Divide each side by '-2.15'. x = 9.76744186 Simplifying x = 9.76744186
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