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Simplifying 4 + 2x = 31 + -7x Solving 4 + 2x = 31 + -7x Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '7x' to each side of the equation. 4 + 2x + 7x = 31 + -7x + 7x Combine like terms: 2x + 7x = 9x 4 + 9x = 31 + -7x + 7x Combine like terms: -7x + 7x = 0 4 + 9x = 31 + 0 4 + 9x = 31 Add '-4' to each side of the equation. 4 + -4 + 9x = 31 + -4 Combine like terms: 4 + -4 = 0 0 + 9x = 31 + -4 9x = 31 + -4 Combine like terms: 31 + -4 = 27 9x = 27 Divide each side by '9'. x = 3 Simplifying x = 3
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