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Simplifying 21 + -15m = 219 Solving 21 + -15m = 219 Solving for variable 'm'. Move all terms containing m to the left, all other terms to the right. Add '-21' to each side of the equation. 21 + -21 + -15m = 219 + -21 Combine like terms: 21 + -21 = 0 0 + -15m = 219 + -21 -15m = 219 + -21 Combine like terms: 219 + -21 = 198 -15m = 198 Divide each side by '-15'. m = -13.2 Simplifying m = -13.2
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