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Simplifying 90 + -5x = 7x Solving 90 + -5x = 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. 90 + -5x + -7x = 7x + -7x Combine like terms: -5x + -7x = -12x 90 + -12x = 7x + -7x Combine like terms: 7x + -7x = 0 90 + -12x = 0 Add '-90' to each side of the equation. 90 + -90 + -12x = 0 + -90 Combine like terms: 90 + -90 = 0 0 + -12x = 0 + -90 -12x = 0 + -90 Combine like terms: 0 + -90 = -90 -12x = -90 Divide each side by '-12'. x = 7.5 Simplifying x = 7.5
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