Respuesta :
Solve for r by simplifying both sides of the equation, then isolating the variable.
r = 26/3
r = 26/3
you have to do (3/5) times and then (3/5) times 7 so now u should have 3/5r - 4.2=1 now do 1+4.2 which gives u 3/5r=5.2 then divide 5.2 by 3/5 which will give you 8.666666667