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Simplifying 7 + x = 3x Solving 7 + x = 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. 7 + x + -3x = 3x + -3x Combine like terms: x + -3x = -2x 7 + -2x = 3x + -3x Combine like terms: 3x + -3x = 0 7 + -2x = 0 Add '-7' to each side of the equation. 7 + -7 + -2x = 0 + -7 Combine like terms: 7 + -7 = 0 0 + -2x = 0 + -7 -2x = 0 + -7 Combine like terms: 0 + -7 = -7 -2x = -7 Divide each side by '-2'. x = 3.5 Simplifying x = 3.5
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