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Simplifying -21x + 6y = (7x + y) Remove parenthesis around (7x + y) -21x + 6y = 7x + y Solving -21x + 6y = 7x + y 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. -21x + -7x + 6y = 7x + -7x + y Combine like terms: -21x + -7x = -28x -28x + 6y = 7x + -7x + y Combine like terms: 7x + -7x = 0 -28x + 6y = 0 + y -28x + 6y = y Add '-6y' to each side of the equation. -28x + 6y + -6y = y + -6y Combine like terms: 6y + -6y = 0 -28x + 0 = y + -6y -28x = y + -6y Combine like terms: y + -6y = -5y -28x = -5y Divide each side by '-28'. x = 0.1785714286y Simplifying x = 0.1785714286y
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