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Simplifying 7x + -9 = 9(2x + -8) + 4x Reorder the terms: -9 + 7x = 9(2x + -8) + 4x Reorder the terms: -9 + 7x = 9(-8 + 2x) + 4x -9 + 7x = (-8 * 9 + 2x * 9) + 4x -9 + 7x = (-72 + 18x) + 4x Combine like terms: 18x + 4x = 22x -9 + 7x = -72 + 22x Solving -9 + 7x = -72 + 22x Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-22x' to each side of the equation. -9 + 7x + -22x = -72 + 22x + -22x Combine like terms: 7x + -22x = -15x -9 + -15x = -72 + 22x + -22x Combine like terms: 22x + -22x = 0 -9 + -15x = -72 + 0 -9 + -15x = -72 Add '9' to each side of the equation. -9 + 9 + -15x = -72 + 9 Combine like terms: -9 + 9 = 0 0 + -15x = -72 + 9 -15x = -72 + 9 Combine like terms: -72 + 9 = -63 -15x = -63 Divide each side by '-15'. x = 4.2 Simplifying x = 4.2
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