Translate the sentence into an equation using n as the unknown number. Then solve the equation for n. 5 increased by half a number is 11.

“Half a number” is 0.5n, and “5 increased by” that amount means add 5: 5 + 0.5n = 11. Subtract 5 to get 0.5n = 6, then divide by 0.5 to find n = 12. Choice A gives this equation and solution.

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