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Simplifying 42 + 3x = 9x + 9 * 8 Multiply 9 * 8 42 + 3x = 9x + 72 Reorder the terms: 42 + 3x = 72 + 9x Solving 42 + 3x = 72 + 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. 42 + 3x + -9x = 72 + 9x + -9x Combine like terms: 3x + -9x = -6x 42 + -6x = 72 + 9x + -9x Combine like terms: 9x + -9x = 0 42 + -6x = 72 + 0 42 + -6x = 72 Add '-42' to each side of the equation. 42 + -42 + -6x = 72 + -42 Combine like terms: 42 + -42 = 0 0 + -6x = 72 + -42 -6x = 72 + -42 Combine like terms: 72 + -42 = 30 -6x = 30 Divide each side by '-6'. x = -5 Simplifying x = -5
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