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Simplifying 84 = 4(8 * 2) + 2(2x) Multiply 8 * 2 84 = 4(16) + 2(2x) Multiply 4 * 16 84 = 64 + 2(2x) Remove parenthesis around (2x) 84 = 64 + 2 * 2x Multiply 2 * 2 84 = 64 + 4x Solving 84 = 64 + 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. 84 + -4x = 64 + 4x + -4x Combine like terms: 4x + -4x = 0 84 + -4x = 64 + 0 84 + -4x = 64 Add '-84' to each side of the equation. 84 + -84 + -4x = 64 + -84 Combine like terms: 84 + -84 = 0 0 + -4x = 64 + -84 -4x = 64 + -84 Combine like terms: 64 + -84 = -20 -4x = -20 Divide each side by '-4'. x = 5 Simplifying x = 5
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