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Simplifying 7x + -7y = 42 Solving 7x + -7y = 42 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '7y' to each side of the equation. 7x + -7y + 7y = 42 + 7y Combine like terms: -7y + 7y = 0 7x + 0 = 42 + 7y 7x = 42 + 7y Divide each side by '7'. x = 6 + y Simplifying x = 6 + y
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