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Simplifying 7x + 6x + -7 = 90 Reorder the terms: -7 + 7x + 6x = 90 Combine like terms: 7x + 6x = 13x -7 + 13x = 90 Solving -7 + 13x = 90 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '7' to each side of the equation. -7 + 7 + 13x = 90 + 7 Combine like terms: -7 + 7 = 0 0 + 13x = 90 + 7 13x = 90 + 7 Combine like terms: 90 + 7 = 97 13x = 97 Divide each side by '13'. x = 7.461538462 Simplifying x = 7.461538462
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