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Simplifying 7x + 2y + 3z = 42 Solving 7x + 2y + 3z = 42 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. 7x + 2y + -2y + 3z = 42 + -2y Combine like terms: 2y + -2y = 0 7x + 0 + 3z = 42 + -2y 7x + 3z = 42 + -2y Add '-3z' to each side of the equation. 7x + 3z + -3z = 42 + -2y + -3z Combine like terms: 3z + -3z = 0 7x + 0 = 42 + -2y + -3z 7x = 42 + -2y + -3z Divide each side by '7'. x = 6 + -0.2857142857y + -0.4285714286z Simplifying x = 6 + -0.2857142857y + -0.4285714286z
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