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Simplifying (x2 + 3xy + -7) + -1(x2 + -2xy + 4) = 0 Reorder the terms: (-7 + 3xy + x2) + -1(x2 + -2xy + 4) = 0 Remove parenthesis around (-7 + 3xy + x2) -7 + 3xy + x2 + -1(x2 + -2xy + 4) = 0 Reorder the terms: -7 + 3xy + x2 + -1(4 + -2xy + x2) = 0 -7 + 3xy + x2 + (4 * -1 + -2xy * -1 + x2 * -1) = 0 -7 + 3xy + x2 + (-4 + 2xy + -1x2) = 0 Reorder the terms: -7 + -4 + 3xy + 2xy + x2 + -1x2 = 0 Combine like terms: -7 + -4 = -11 -11 + 3xy + 2xy + x2 + -1x2 = 0 Combine like terms: 3xy + 2xy = 5xy -11 + 5xy + x2 + -1x2 = 0 Combine like terms: x2 + -1x2 = 0 -11 + 5xy + 0 = 0 -11 + 5xy = 0 Solving -11 + 5xy = 0 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '11' to each side of the equation. -11 + 11 + 5xy = 0 + 11 Combine like terms: -11 + 11 = 0 0 + 5xy = 0 + 11 5xy = 0 + 11 Combine like terms: 0 + 11 = 11 5xy = 11 Divide each side by '5y'. x = 2.2y-1 Simplifying x = 2.2y-1
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