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Simplifying 30 + 4x = 30 + 7x Add '-30' to each side of the equation. 30 + -30 + 4x = 30 + -30 + 7x Combine like terms: 30 + -30 = 0 0 + 4x = 30 + -30 + 7x 4x = 30 + -30 + 7x Combine like terms: 30 + -30 = 0 4x = 0 + 7x 4x = 7x Solving 4x = 7x 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. 4x + -7x = 7x + -7x Combine like terms: 4x + -7x = -3x -3x = 7x + -7x Combine like terms: 7x + -7x = 0 -3x = 0 Divide each side by '-3'. x = 0 Simplifying x = 0
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