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Simplifying (5y + 1) + (7x + -18) = 90 Reorder the terms: (1 + 5y) + (7x + -18) = 90 Remove parenthesis around (1 + 5y) 1 + 5y + (7x + -18) = 90 Reorder the terms: 1 + 5y + (-18 + 7x) = 90 Remove parenthesis around (-18 + 7x) 1 + 5y + -18 + 7x = 90 Reorder the terms: 1 + -18 + 7x + 5y = 90 Combine like terms: 1 + -18 = -17 -17 + 7x + 5y = 90 Solving -17 + 7x + 5y = 90 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '17' to each side of the equation. -17 + 7x + 17 + 5y = 90 + 17 Reorder the terms: -17 + 17 + 7x + 5y = 90 + 17 Combine like terms: -17 + 17 = 0 0 + 7x + 5y = 90 + 17 7x + 5y = 90 + 17 Combine like terms: 90 + 17 = 107 7x + 5y = 107 Add '-5y' to each side of the equation. 7x + 5y + -5y = 107 + -5y Combine like terms: 5y + -5y = 0 7x + 0 = 107 + -5y 7x = 107 + -5y Divide each side by '7'. x = 15.28571429 + -0.7142857143y Simplifying x = 15.28571429 + -0.7142857143y
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