Question

3(r-6)+2=4(r+2)-21 find the value of x and show steps

Answer 1

 3(r-6) +2 = 4(r+2) -21
3r - 6r +2 = 4r +8 -21
     -3r +2 = 4r -13
            2 = 7r -13
          15 = 7r
             r = $\frac{15}{2}$
             r = 7.5