张奶奶家养鸡和鸭共72只,鸡的只数是鸭的7倍。张奶奶家养鸡和鸭各多少只?(用方程解)'J/r8C4a'Y)N7e5J7]4[-R5q-L
算式:提示:d2w;t'L)Y*N:K3Y1D8m,Z:p*_'}(f-r+l7P'J/r8C4a'Y)N7e5J7]4[-R5q-L
张奶奶家养鸭*v.O:m7{*J,s只;养鸭;I7a2|.}9A8X+Y2l2@)G只。'J/r8C4a'Y)N7e5J7]4[-R5q-L