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Simplifying 3x + -7 = -39 + 7x Reorder the terms: -7 + 3x = -39 + 7x Solving -7 + 3x = -39 + 7x Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-7x' to each side of the equation. -7 + 3x + -7x = -39 + 7x + -7x Combine like terms: 3x + -7x = -4x -7 + -4x = -39 + 7x + -7x Combine like terms: 7x + -7x = 0 -7 + -4x = -39 + 0 -7 + -4x = -39 Add '7' to each side of the equation. -7 + 7 + -4x = -39 + 7 Combine like terms: -7 + 7 = 0 0 + -4x = -39 + 7 -4x = -39 + 7 Combine like terms: -39 + 7 = -32 -4x = -32 Divide each side by '-4'. x = 8 Simplifying x = 8
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