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Simplifying 7x + -1(3y) = 7 Remove parenthesis around (3y) 7x + -1 * 3y = 7 Multiply -1 * 3 7x + -3y = 7 Solving 7x + -3y = 7 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '3y' to each side of the equation. 7x + -3y + 3y = 7 + 3y Combine like terms: -3y + 3y = 0 7x + 0 = 7 + 3y 7x = 7 + 3y Divide each side by '7'. x = 1 + 0.4285714286y Simplifying x = 1 + 0.4285714286y
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