How do you solve #3r - 5= 2( 4r - 9)#?

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Answer 1 · 2016-10-22T14:54:27

#r=2.6#

#3r-5=2(4r-9)#

Expand the brackets.

#3r-5=8r-18#

Move all r variables to one side.

#-5=5r-18#

Add 18 in order to find what #5r# equals.

#13=5r#

Now divide by 5 to find the value of #r#.

#r=2.6#