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Simplifying 251 + -3x = 42x + 21 Reorder the terms: 251 + -3x = 21 + 42x Solving 251 + -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. 251 + -3x + -42x = 21 + 42x + -42x Combine like terms: -3x + -42x = -45x 251 + -45x = 21 + 42x + -42x Combine like terms: 42x + -42x = 0 251 + -45x = 21 + 0 251 + -45x = 21 Add '-251' to each side of the equation. 251 + -251 + -45x = 21 + -251 Combine like terms: 251 + -251 = 0 0 + -45x = 21 + -251 -45x = 21 + -251 Combine like terms: 21 + -251 = -230 -45x = -230 Divide each side by '-45'. x = 5.111111111 Simplifying x = 5.111111111
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