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Simplifying x + 20 + x + -45 + x + -15 + 130 + 70 = 540 Reorder the terms: 20 + -45 + -15 + 130 + 70 + x + x + x = 540 Combine like terms: 20 + -45 = -25 -25 + -15 + 130 + 70 + x + x + x = 540 Combine like terms: -25 + -15 = -40 -40 + 130 + 70 + x + x + x = 540 Combine like terms: -40 + 130 = 90 90 + 70 + x + x + x = 540 Combine like terms: 90 + 70 = 160 160 + x + x + x = 540 Combine like terms: x + x = 2x 160 + 2x + x = 540 Combine like terms: 2x + x = 3x 160 + 3x = 540 Solving 160 + 3x = 540 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-160' to each side of the equation. 160 + -160 + 3x = 540 + -160 Combine like terms: 160 + -160 = 0 0 + 3x = 540 + -160 3x = 540 + -160 Combine like terms: 540 + -160 = 380 3x = 380 Divide each side by '3'. x = 126.6666667 Simplifying x = 126.6666667
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