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Simplifying 2(x + -90) = -7(x + 9) Reorder the terms: 2(-90 + x) = -7(x + 9) (-90 * 2 + x * 2) = -7(x + 9) (-180 + 2x) = -7(x + 9) Reorder the terms: -180 + 2x = -7(9 + x) -180 + 2x = (9 * -7 + x * -7) -180 + 2x = (-63 + -7x) Solving -180 + 2x = -63 + -7x Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '7x' to each side of the equation. -180 + 2x + 7x = -63 + -7x + 7x Combine like terms: 2x + 7x = 9x -180 + 9x = -63 + -7x + 7x Combine like terms: -7x + 7x = 0 -180 + 9x = -63 + 0 -180 + 9x = -63 Add '180' to each side of the equation. -180 + 180 + 9x = -63 + 180 Combine like terms: -180 + 180 = 0 0 + 9x = -63 + 180 9x = -63 + 180 Combine like terms: -63 + 180 = 117 9x = 117 Divide each side by '9'. x = 13 Simplifying x = 13
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