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Simplifying 40 + -3x = 20 + 7x Solving 40 + -3x = 20 + 7x Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-7x' to each side of the equation. 40 + -3x + -7x = 20 + 7x + -7x Combine like terms: -3x + -7x = -10x 40 + -10x = 20 + 7x + -7x Combine like terms: 7x + -7x = 0 40 + -10x = 20 + 0 40 + -10x = 20 Add '-40' to each side of the equation. 40 + -40 + -10x = 20 + -40 Combine like terms: 40 + -40 = 0 0 + -10x = 20 + -40 -10x = 20 + -40 Combine like terms: 20 + -40 = -20 -10x = -20 Divide each side by '-10'. x = 2 Simplifying x = 2
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