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Simplifying 131 + -3x = 42x + 21 Reorder the terms: 131 + -3x = 21 + 42x Solving 131 + -3x = 21 + 42x Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-42x' to each side of the equation. 131 + -3x + -42x = 21 + 42x + -42x Combine like terms: -3x + -42x = -45x 131 + -45x = 21 + 42x + -42x Combine like terms: 42x + -42x = 0 131 + -45x = 21 + 0 131 + -45x = 21 Add '-131' to each side of the equation. 131 + -131 + -45x = 21 + -131 Combine like terms: 131 + -131 = 0 0 + -45x = 21 + -131 -45x = 21 + -131 Combine like terms: 21 + -131 = -110 -45x = -110 Divide each side by '-45'. x = 2.444444444 Simplifying x = 2.444444444
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