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Simplifying 3(7 + 2x) = 5(2x + 4x) (7 * 3 + 2x * 3) = 5(2x + 4x) (21 + 6x) = 5(2x + 4x) Combine like terms: 2x + 4x = 6x 21 + 6x = 5(6x) Remove parenthesis around (6x) 21 + 6x = 5 * 6x Multiply 5 * 6 21 + 6x = 30x Solving 21 + 6x = 30x Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-30x' to each side of the equation. 21 + 6x + -30x = 30x + -30x Combine like terms: 6x + -30x = -24x 21 + -24x = 30x + -30x Combine like terms: 30x + -30x = 0 21 + -24x = 0 Add '-21' to each side of the equation. 21 + -21 + -24x = 0 + -21 Combine like terms: 21 + -21 = 0 0 + -24x = 0 + -21 -24x = 0 + -21 Combine like terms: 0 + -21 = -21 -24x = -21 Divide each side by '-24'. x = 0.875 Simplifying x = 0.875
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