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Simplifying 9 + -7x = 144 + -42x Solving 9 + -7x = 144 + -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. 9 + -7x + 42x = 144 + -42x + 42x Combine like terms: -7x + 42x = 35x 9 + 35x = 144 + -42x + 42x Combine like terms: -42x + 42x = 0 9 + 35x = 144 + 0 9 + 35x = 144 Add '-9' to each side of the equation. 9 + -9 + 35x = 144 + -9 Combine like terms: 9 + -9 = 0 0 + 35x = 144 + -9 35x = 144 + -9 Combine like terms: 144 + -9 = 135 35x = 135 Divide each side by '35'. x = 3.857142857 Simplifying x = 3.857142857
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