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Simplifying 7x + -15y + 12 = 20 Reorder the terms: 12 + 7x + -15y = 20 Solving 12 + 7x + -15y = 20 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-12' to each side of the equation. 12 + 7x + -12 + -15y = 20 + -12 Reorder the terms: 12 + -12 + 7x + -15y = 20 + -12 Combine like terms: 12 + -12 = 0 0 + 7x + -15y = 20 + -12 7x + -15y = 20 + -12 Combine like terms: 20 + -12 = 8 7x + -15y = 8 Add '15y' to each side of the equation. 7x + -15y + 15y = 8 + 15y Combine like terms: -15y + 15y = 0 7x + 0 = 8 + 15y 7x = 8 + 15y Divide each side by '7'. x = 1.142857143 + 2.142857143y Simplifying x = 1.142857143 + 2.142857143y
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