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Simplifying -30 = 4x + 3(x + -3) Reorder the terms: -30 = 4x + 3(-3 + x) -30 = 4x + (-3 * 3 + x * 3) -30 = 4x + (-9 + 3x) Reorder the terms: -30 = -9 + 4x + 3x Combine like terms: 4x + 3x = 7x -30 = -9 + 7x Solving -30 = -9 + 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. -30 + -7x = -9 + 7x + -7x Combine like terms: 7x + -7x = 0 -30 + -7x = -9 + 0 -30 + -7x = -9 Add '30' to each side of the equation. -30 + 30 + -7x = -9 + 30 Combine like terms: -30 + 30 = 0 0 + -7x = -9 + 30 -7x = -9 + 30 Combine like terms: -9 + 30 = 21 -7x = 21 Divide each side by '-7'. x = -3 Simplifying x = -3
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