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Simplifying 7x + -2(5y + -1) = z Reorder the terms: 7x + -2(-1 + 5y) = z 7x + (-1 * -2 + 5y * -2) = z 7x + (2 + -10y) = z Reorder the terms: 2 + 7x + -10y = z Solving 2 + 7x + -10y = z Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-2' to each side of the equation. 2 + 7x + -2 + -10y = -2 + z Reorder the terms: 2 + -2 + 7x + -10y = -2 + z Combine like terms: 2 + -2 = 0 0 + 7x + -10y = -2 + z 7x + -10y = -2 + z Add '10y' to each side of the equation. 7x + -10y + 10y = -2 + 10y + z Combine like terms: -10y + 10y = 0 7x + 0 = -2 + 10y + z 7x = -2 + 10y + z Divide each side by '7'. x = -0.2857142857 + 1.428571429y + 0.1428571429z Simplifying x = -0.2857142857 + 1.428571429y + 0.1428571429z
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