Question

how to do a alegebra sum ? (do ur own problem)

Answer 1

for example  4r - 7 =8r + 13
                  = 4r - 8r = 13 + 7
                  = - 4r = 20
                  = -r = 20/4
                  = -r = 5.
                              ans.

Answer 2

(Logbtothe base a)(logc baseb)(logd base c)(loga base d)=logbcda to the base abcd=1