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Simplifying 45 + -7x = 2x + 20 Reorder the terms: 45 + -7x = 20 + 2x Solving 45 + -7x = 20 + 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. 45 + -7x + -2x = 20 + 2x + -2x Combine like terms: -7x + -2x = -9x 45 + -9x = 20 + 2x + -2x Combine like terms: 2x + -2x = 0 45 + -9x = 20 + 0 45 + -9x = 20 Add '-45' to each side of the equation. 45 + -45 + -9x = 20 + -45 Combine like terms: 45 + -45 = 0 0 + -9x = 20 + -45 -9x = 20 + -45 Combine like terms: 20 + -45 = -25 -9x = -25 Divide each side by '-9'. x = 2.777777778 Simplifying x = 2.777777778
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