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Simplifying 75 = 3x + (x + -3) Reorder the terms: 75 = 3x + (-3 + x) Remove parenthesis around (-3 + x) 75 = 3x + -3 + x Reorder the terms: 75 = -3 + 3x + x Combine like terms: 3x + x = 4x 75 = -3 + 4x Solving 75 = -3 + 4x Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-4x' to each side of the equation. 75 + -4x = -3 + 4x + -4x Combine like terms: 4x + -4x = 0 75 + -4x = -3 + 0 75 + -4x = -3 Add '-75' to each side of the equation. 75 + -75 + -4x = -3 + -75 Combine like terms: 75 + -75 = 0 0 + -4x = -3 + -75 -4x = -3 + -75 Combine like terms: -3 + -75 = -78 -4x = -78 Divide each side by '-4'. x = 19.5 Simplifying x = 19.5
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