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[1] c' =cBeta(1+r) [2] c+c'/(1+r) = y+y'/1+r [3] w=y+y'/1+r then he wrote c+cBeta(1+r)/1+r = y+y'/1+r this part i don't understand c*=[(1/(1+beta)]W
[1] c' =cBeta(1+r)[2] c+c'/(1+r) = y+y'/1+r[3] w=y+y'/1+rthen he wrote c+cBeta(1+r)/1+r = y+y'/1+rthis part i don't understand how did he get this