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Simplifying -1 + zx(-7 + -2) = -19 Combine like terms: -7 + -2 = -9 -1 + xz(-9) = -19 Reorder the terms for easier multiplication: -1 + -9xz = -19 Solving -1 + -9xz = -19 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1' to each side of the equation. -1 + 1 + -9xz = -19 + 1 Combine like terms: -1 + 1 = 0 0 + -9xz = -19 + 1 -9xz = -19 + 1 Combine like terms: -19 + 1 = -18 -9xz = -18 Divide each side by '-9z'. x = 2z-1 Simplifying x = 2z-1
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