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Simplifying 30 = 4x + 2z Solving 30 = 4x + 2z Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-4x' to each side of the equation. 30 + -4x = 4x + -4x + 2z Combine like terms: 4x + -4x = 0 30 + -4x = 0 + 2z 30 + -4x = 2z Add '-30' to each side of the equation. 30 + -30 + -4x = -30 + 2z Combine like terms: 30 + -30 = 0 0 + -4x = -30 + 2z -4x = -30 + 2z Divide each side by '-4'. x = 7.5 + -0.5z Simplifying x = 7.5 + -0.5z
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