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Evgesh-ka [11]
3 years ago
5

How can you solve an equation with the variable on both sides plz help

Mathematics
1 answer:
Sergeeva-Olga [200]3 years ago
7 0
I don't know if this is the right one but i hope this helps. this is how i learned it. 
step 1=get variables on one side oof the equal sign by using inverse operation (add or subtract smaller variable) 
step 2= get constants away from variable to the other side of the equal sign by using inverse operations (add or subtract constant) 
step 3: isolate the variable using inverse operation (multiply or divide) 
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Andrej [43]
We know that
The formula for combinations is
C=n!/[(n-r)!*r!]
where
n is the total number of objects you choose from
r is the number that you choose to arrange

in this problem
n=15 students
r=4 students
C=15!/[(15-4)!*4!]-----> C=15!/[11!*4!]---> (15*14*13*12*11!)/(11!*4*3*2*1)
C=(15*14*13*12)/(24)----->C=1365

the answer is
1365
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