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Simplifying 23x + x + 3x + (x + -7) = 133 Reorder the terms: 23x + x + 3x + (-7 + x) = 133 Remove parenthesis around (-7 + x) 23x + x + 3x + -7 + x = 133 Reorder the terms: -7 + 23x + x + 3x + x = 133 Combine like terms: 23x + x = 24x -7 + 24x + 3x + x = 133 Combine like terms: 24x + 3x = 27x -7 + 27x + x = 133 Combine like terms: 27x + x = 28x -7 + 28x = 133 Solving -7 + 28x = 133 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '7' to each side of the equation. -7 + 7 + 28x = 133 + 7 Combine like terms: -7 + 7 = 0 0 + 28x = 133 + 7 28x = 133 + 7 Combine like terms: 133 + 7 = 140 28x = 140 Divide each side by '28'. x = 5 Simplifying x = 5
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