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Simplifying 40 = 420 + 2x Solving 40 = 420 + 2x Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-2x' to each side of the equation. 40 + -2x = 420 + 2x + -2x Combine like terms: 2x + -2x = 0 40 + -2x = 420 + 0 40 + -2x = 420 Add '-40' to each side of the equation. 40 + -40 + -2x = 420 + -40 Combine like terms: 40 + -40 = 0 0 + -2x = 420 + -40 -2x = 420 + -40 Combine like terms: 420 + -40 = 380 -2x = 380 Divide each side by '-2'. x = -190 Simplifying x = -190
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