How do you solve #3|2a-5| = 21#?

1 Answer
Chirag Mehta
Mar 3, 2018

#6,-1#

Explanation:

Modulus simply take a postive value
#|-1|=+1#

now, we have
#=>3|2a-5|=21|#

#=>|2a-5|=21/3#

#=>|2a-5|=7#

#=>2a-5=7 " or " 2a-5=-7#
#=>2a=7+5 " or " 2a-5=-7#
#=>2a=12 " or " 2a=5-7#
#=>a=12/2 =6" or "a=-2/2=-1#

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