Question 60606


(r + 6)/5 = ( r + 8 ) /7  


 now multiply both sides of the equation  by the lowest common multiple of 5 and 7

that is,
35 * (r + 6)/5 = 35 * ( r + 8 )/7

7 * (r + 6 ) = 5* (r+8)

now remove the brackets by multiplying the terms out side the brackets.

7 * r + 7 * 6  = 5 * r + 5* 8

7r + 42  =  5r + 40
 
now bring the like terms together.

7r - 5r  =  40 - 42

==>  2r  = -2

now divide both sides of the equation by 2

==>  r = -2/2

==>  r =  -1


Bye !!!!!!!!