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Simplifying 3x + 7(-2) = -21 Multiply 7 * -2 3x + -14 = -21 Reorder the terms: -14 + 3x = -21 Solving -14 + 3x = -21 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '14' to each side of the equation. -14 + 14 + 3x = -21 + 14 Combine like terms: -14 + 14 = 0 0 + 3x = -21 + 14 3x = -21 + 14 Combine like terms: -21 + 14 = -7 3x = -7 Divide each side by '3'. x = -2.333333333 Simplifying x = -2.333333333
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