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(18) a = 5000 7a = 10000 8a = 15000 x = A's capital x+2a = B's " x+3a = C r = B rate r-1 = A " r+1 = C? 16a/100 = 800 3a/10 = 1500

rx-x/100 + 16a/100 = rx+2ar/100 (1) rx-x/100 + 3a/10 = rx+3ar+x+3a/100 (2) x = (16-2r)a x = (27-3r/2)a 32-4r = 27-3r r = 5

x = frost at 5 per ct a-x = " " 4 " " 5x/100 + 4q-4x/100 = 6

Text written sideways: (19) a = 1000? x =? gr z = less r = gr rate expressed in dec t = less " " " "

x+y = 13a (1) rx = ty (2) tx = 360 (3) ry = 490 (4)

(t/r)x/y = 36/49 (5)

x/y = 6/r x = 68/7 xexponent 7/zexponent 2 = 36/49 6z/7+y = 13a w/z = 6/7 13z = 7.13a

                                                                z = 7a