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Simplifying 90 + 2x = 4x Solving 90 + 2x = 4x 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. 90 + 2x + -4x = 4x + -4x Combine like terms: 2x + -4x = -2x 90 + -2x = 4x + -4x Combine like terms: 4x + -4x = 0 90 + -2x = 0 Add '-90' to each side of the equation. 90 + -90 + -2x = 0 + -90 Combine like terms: 90 + -90 = 0 0 + -2x = 0 + -90 -2x = 0 + -90 Combine like terms: 0 + -90 = -90 -2x = -90 Divide each side by '-2'. x = 45 Simplifying x = 45
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