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Simplifying 7 + 5x = 15x + 3x Combine like terms: 15x + 3x = 18x 7 + 5x = 18x Solving 7 + 5x = 18x Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-18x' to each side of the equation. 7 + 5x + -18x = 18x + -18x Combine like terms: 5x + -18x = -13x 7 + -13x = 18x + -18x Combine like terms: 18x + -18x = 0 7 + -13x = 0 Add '-7' to each side of the equation. 7 + -7 + -13x = 0 + -7 Combine like terms: 7 + -7 = 0 0 + -13x = 0 + -7 -13x = 0 + -7 Combine like terms: 0 + -7 = -7 -13x = -7 Divide each side by '-13'. x = 0.5384615385 Simplifying x = 0.5384615385
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