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Simplifying 9 = 7(x + -4) + 2x Reorder the terms: 9 = 7(-4 + x) + 2x 9 = (-4 * 7 + x * 7) + 2x 9 = (-28 + 7x) + 2x Combine like terms: 7x + 2x = 9x 9 = -28 + 9x Solving 9 = -28 + 9x Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-9x' to each side of the equation. 9 + -9x = -28 + 9x + -9x Combine like terms: 9x + -9x = 0 9 + -9x = -28 + 0 9 + -9x = -28 Add '-9' to each side of the equation. 9 + -9 + -9x = -28 + -9 Combine like terms: 9 + -9 = 0 0 + -9x = -28 + -9 -9x = -28 + -9 Combine like terms: -28 + -9 = -37 -9x = -37 Divide each side by '-9'. x = 4.111111111 Simplifying x = 4.111111111
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