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Simplifying 65 + -3x = 15x + 21 Reorder the terms: 65 + -3x = 21 + 15x Solving 65 + -3x = 21 + 15x Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-15x' to each side of the equation. 65 + -3x + -15x = 21 + 15x + -15x Combine like terms: -3x + -15x = -18x 65 + -18x = 21 + 15x + -15x Combine like terms: 15x + -15x = 0 65 + -18x = 21 + 0 65 + -18x = 21 Add '-65' to each side of the equation. 65 + -65 + -18x = 21 + -65 Combine like terms: 65 + -65 = 0 0 + -18x = 21 + -65 -18x = 21 + -65 Combine like terms: 21 + -65 = -44 -18x = -44 Divide each side by '-18'. x = 2.444444444 Simplifying x = 2.444444444
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