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Simplifying -90 = 30x Solving -90 = 30x Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-30x' to each side of the equation. -90 + -30x = 30x + -30x Combine like terms: 30x + -30x = 0 -90 + -30x = 0 Add '90' to each side of the equation. -90 + 90 + -30x = 0 + 90 Combine like terms: -90 + 90 = 0 0 + -30x = 0 + 90 -30x = 0 + 90 Combine like terms: 0 + 90 = 90 -30x = 90 Divide each side by '-30'. x = -3 Simplifying x = -3
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