How do you solve #\frac { 45} { 75} = \frac { r } { 5}#?

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Answer 1 · 2017-04-03T20:06:15

#r=3#

Before solving we can cancel out the denominator and the numerator to give us something much easier to work with

#45/75# = #3/5#

#3/5#=#r/5#

Now you do the cross over method so that equation becomes linear.

15=#5r#

Divide by five to isolate #r#.

#r#=3