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Simplifying -9 = 7(-3x) Remove parenthesis around (-3x) -9 = 7 * -3x Multiply 7 * -3 -9 = -21x Solving -9 = -21x Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '21x' to each side of the equation. -9 + 21x = -21x + 21x Combine like terms: -21x + 21x = 0 -9 + 21x = 0 Add '9' to each side of the equation. -9 + 9 + 21x = 0 + 9 Combine like terms: -9 + 9 = 0 0 + 21x = 0 + 9 21x = 0 + 9 Combine like terms: 0 + 9 = 9 21x = 9 Divide each side by '21'. x = 0.4285714286 Simplifying x = 0.4285714286
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