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Simplifying -123 + -7x = 135 + -42x Solving -123 + -7x = 135 + -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. -123 + -7x + 42x = 135 + -42x + 42x Combine like terms: -7x + 42x = 35x -123 + 35x = 135 + -42x + 42x Combine like terms: -42x + 42x = 0 -123 + 35x = 135 + 0 -123 + 35x = 135 Add '123' to each side of the equation. -123 + 123 + 35x = 135 + 123 Combine like terms: -123 + 123 = 0 0 + 35x = 135 + 123 35x = 135 + 123 Combine like terms: 135 + 123 = 258 35x = 258 Divide each side by '35'. x = 7.371428571 Simplifying x = 7.371428571
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