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Simplifying 21 = 0.7x Solving 21 = 0.7x Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.7x' to each side of the equation. 21 + -0.7x = 0.7x + -0.7x Combine like terms: 0.7x + -0.7x = 0.0 21 + -0.7x = 0.0 Add '-21' to each side of the equation. 21 + -21 + -0.7x = 0.0 + -21 Combine like terms: 21 + -21 = 0 0 + -0.7x = 0.0 + -21 -0.7x = 0.0 + -21 Combine like terms: 0.0 + -21 = -21 -0.7x = -21 Divide each side by '-0.7'. x = 30 Simplifying x = 30
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