Answer:

Step-by-step explanation:
The given expression is : 
We need to simplify the above expression.
We know that, 
or

So, the simplified form of the given expression is
. Hence, the correct option is (A).
Answer:
The number is 220
Step-by-step explanation:
Let n represent the number
10(2) + n = 240
20 + n = 240
240 - 20 = 220
n = 220
Answer:
x=7
Step-by-step explanation:
25x+5=180
-5 -5
25x=175
/25 /25
Answer:
18 or 15
Step-by-step explanation:
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