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Simplifying 3x + -1(2x + 7) = 30 Reorder the terms: 3x + -1(7 + 2x) = 30 3x + (7 * -1 + 2x * -1) = 30 3x + (-7 + -2x) = 30 Reorder the terms: -7 + 3x + -2x = 30 Combine like terms: 3x + -2x = 1x -7 + 1x = 30 Solving -7 + 1x = 30 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 + 1x = 30 + 7 Combine like terms: -7 + 7 = 0 0 + 1x = 30 + 7 1x = 30 + 7 Combine like terms: 30 + 7 = 37 1x = 37 Divide each side by '1'. x = 37 Simplifying x = 37
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