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Simplifying 420 = 7000 * 0.12x Multiply 7000 * 0.12 420 = 840x Solving 420 = 840x Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-840x' to each side of the equation. 420 + -840x = 840x + -840x Combine like terms: 840x + -840x = 0 420 + -840x = 0 Add '-420' to each side of the equation. 420 + -420 + -840x = 0 + -420 Combine like terms: 420 + -420 = 0 0 + -840x = 0 + -420 -840x = 0 + -420 Combine like terms: 0 + -420 = -420 -840x = -420 Divide each side by '-840'. x = 0.5 Simplifying x = 0.5
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