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Simplifying 103 = 5x + 4(2x + 3) Reorder the terms: 103 = 5x + 4(3 + 2x) 103 = 5x + (3 * 4 + 2x * 4) 103 = 5x + (12 + 8x) Reorder the terms: 103 = 12 + 5x + 8x Combine like terms: 5x + 8x = 13x 103 = 12 + 13x Solving 103 = 12 + 13x Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-13x' to each side of the equation. 103 + -13x = 12 + 13x + -13x Combine like terms: 13x + -13x = 0 103 + -13x = 12 + 0 103 + -13x = 12 Add '-103' to each side of the equation. 103 + -103 + -13x = 12 + -103 Combine like terms: 103 + -103 = 0 0 + -13x = 12 + -103 -13x = 12 + -103 Combine like terms: 12 + -103 = -91 -13x = -91 Divide each side by '-13'. x = 7 Simplifying x = 7
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