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Simplifying 30 + -7x = 10x + 21 Reorder the terms: 30 + -7x = 21 + 10x Solving 30 + -7x = 21 + 10x Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-10x' to each side of the equation. 30 + -7x + -10x = 21 + 10x + -10x Combine like terms: -7x + -10x = -17x 30 + -17x = 21 + 10x + -10x Combine like terms: 10x + -10x = 0 30 + -17x = 21 + 0 30 + -17x = 21 Add '-30' to each side of the equation. 30 + -30 + -17x = 21 + -30 Combine like terms: 30 + -30 = 0 0 + -17x = 21 + -30 -17x = 21 + -30 Combine like terms: 21 + -30 = -9 -17x = -9 Divide each side by '-17'. x = 0.5294117647 Simplifying x = 0.5294117647
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