The only way to simplify an addition problem is to solve it.
25+345=370
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To find 25 percent of 345, you simply multiply 345 by 0.25 (which is the decimal form of 25 percent). Therefore, 25 percent of 345 is 86.25.
Add like terms together: 21x-21
4a+5=25 4a=25-5 4a=20 a=20/4 a=5
x+25=138 subtract both sides of the equation by 25 (x+25)-25=138-25 simplify x=138-25 x=114
(a + 5) (a - 5) = a2 - 25