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Simplifying 3(2x + -7) = 87 Reorder the terms: 3(-7 + 2x) = 87 (-7 * 3 + 2x * 3) = 87 (-21 + 6x) = 87 Solving -21 + 6x = 87 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '21' to each side of the equation. -21 + 21 + 6x = 87 + 21 Combine like terms: -21 + 21 = 0 0 + 6x = 87 + 21 6x = 87 + 21 Combine like terms: 87 + 21 = 108 6x = 108 Divide each side by '6'. x = 18 Simplifying x = 18
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