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Simplifying 30 + -2x = 170 + -42x Solving 30 + -2x = 170 + -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. 30 + -2x + 42x = 170 + -42x + 42x Combine like terms: -2x + 42x = 40x 30 + 40x = 170 + -42x + 42x Combine like terms: -42x + 42x = 0 30 + 40x = 170 + 0 30 + 40x = 170 Add '-30' to each side of the equation. 30 + -30 + 40x = 170 + -30 Combine like terms: 30 + -30 = 0 0 + 40x = 170 + -30 40x = 170 + -30 Combine like terms: 170 + -30 = 140 40x = 140 Divide each side by '40'. x = 3.5 Simplifying x = 3.5
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