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Simplifying 20 + -3x = 30 + -7x Solving 20 + -3x = 30 + -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. 20 + -3x + 7x = 30 + -7x + 7x Combine like terms: -3x + 7x = 4x 20 + 4x = 30 + -7x + 7x Combine like terms: -7x + 7x = 0 20 + 4x = 30 + 0 20 + 4x = 30 Add '-20' to each side of the equation. 20 + -20 + 4x = 30 + -20 Combine like terms: 20 + -20 = 0 0 + 4x = 30 + -20 4x = 30 + -20 Combine like terms: 30 + -20 = 10 4x = 10 Divide each side by '4'. x = 2.5 Simplifying x = 2.5
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