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Simplifying 21 + 15x = -65 + 17x Solving 21 + 15x = -65 + 17x Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-17x' to each side of the equation. 21 + 15x + -17x = -65 + 17x + -17x Combine like terms: 15x + -17x = -2x 21 + -2x = -65 + 17x + -17x Combine like terms: 17x + -17x = 0 21 + -2x = -65 + 0 21 + -2x = -65 Add '-21' to each side of the equation. 21 + -21 + -2x = -65 + -21 Combine like terms: 21 + -21 = 0 0 + -2x = -65 + -21 -2x = -65 + -21 Combine like terms: -65 + -21 = -86 -2x = -86 Divide each side by '-2'. x = 43 Simplifying x = 43
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