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