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Simplifying 30 + -30x + 90 = -90 + -30x Reorder the terms: 30 + 90 + -30x = -90 + -30x Combine like terms: 30 + 90 = 120 120 + -30x = -90 + -30x Add '30x' to each side of the equation. 120 + -30x + 30x = -90 + -30x + 30x Combine like terms: -30x + 30x = 0 120 + 0 = -90 + -30x + 30x 120 = -90 + -30x + 30x Combine like terms: -30x + 30x = 0 120 = -90 + 0 120 = -90 Solving 120 = -90 Couldn't find a variable to solve for. This equation is invalid, the left and right sides are not equal, therefore there is no solution.
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