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Simplifying 42x + 90 = 42x + 79 Reorder the terms: 90 + 42x = 42x + 79 Reorder the terms: 90 + 42x = 79 + 42x Add '-42x' to each side of the equation. 90 + 42x + -42x = 79 + 42x + -42x Combine like terms: 42x + -42x = 0 90 + 0 = 79 + 42x + -42x 90 = 79 + 42x + -42x Combine like terms: 42x + -42x = 0 90 = 79 + 0 90 = 79 Solving 90 = 79 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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