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zubka84 [21]
3 years ago
9

why can you write a subtraction problem as an addition problem?How do you write a subtraction problem as an addition problem?

Mathematics
1 answer:
-Dominant- [34]3 years ago
6 0

You can write a subtraction problem as a division problem by subtracting one of the addends from the sum, then your other addend would be the answer.

Example :

5 + 6 = 11

11 - 5 = 6


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10. from the question; the circle theorem obeyed is "angled formed by semi-circle"

The angle formed in a semicircle is 90 degrees, hence

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This gives

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But

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\begin{gathered} 2x\text{ + 8 + 5x - 2 = 90} \\ 2x\text{ + 5x + 8 - 2 = 90} \\ 7x\text{ + 6 = 90} \\ 7x\text{ = 90 -6} \\ 7x\text{ = 84} \\ \text{divide both sides by 7} \\ x\text{ = }\frac{84}{7} \\ x\text{ = 12} \end{gathered}

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Answer:

Answer is below

Step-by-step explanation:

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I graphed the lines on the graph below to show you that they intersect at the point (4,5).

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