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Simplifying 3x + 7 = 12x + -30 Reorder the terms: 7 + 3x = 12x + -30 Reorder the terms: 7 + 3x = -30 + 12x Solving 7 + 3x = -30 + 12x Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-12x' to each side of the equation. 7 + 3x + -12x = -30 + 12x + -12x Combine like terms: 3x + -12x = -9x 7 + -9x = -30 + 12x + -12x Combine like terms: 12x + -12x = 0 7 + -9x = -30 + 0 7 + -9x = -30 Add '-7' to each side of the equation. 7 + -7 + -9x = -30 + -7 Combine like terms: 7 + -7 = 0 0 + -9x = -30 + -7 -9x = -30 + -7 Combine like terms: -30 + -7 = -37 -9x = -37 Divide each side by '-9'. x = 4.111111111 Simplifying x = 4.111111111
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