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Simplifying 18 + -7x = 30 + -3x Solving 18 + -7x = 30 + -3x Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '3x' to each side of the equation. 18 + -7x + 3x = 30 + -3x + 3x Combine like terms: -7x + 3x = -4x 18 + -4x = 30 + -3x + 3x Combine like terms: -3x + 3x = 0 18 + -4x = 30 + 0 18 + -4x = 30 Add '-18' to each side of the equation. 18 + -18 + -4x = 30 + -18 Combine like terms: 18 + -18 = 0 0 + -4x = 30 + -18 -4x = 30 + -18 Combine like terms: 30 + -18 = 12 -4x = 12 Divide each side by '-4'. x = -3 Simplifying x = -3
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