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Simplifying 7x + -9y = -15 Solving 7x + -9y = -15 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '9y' to each side of the equation. 7x + -9y + 9y = -15 + 9y Combine like terms: -9y + 9y = 0 7x + 0 = -15 + 9y 7x = -15 + 9y Divide each side by '7'. x = -2.142857143 + 1.285714286y Simplifying x = -2.142857143 + 1.285714286y
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