两个工程队共同开凿一条157.5米长的隧道,各从一端相向施工,9天打通。甲队每天开凿7.8米,乙队每天开凿多少米?(用方程解).T5\*L(t1~6o+@2g1](D/x
算式:提示,g*k3D7E.b'k/^)V5T:V9l4}7T.~0n3a8w.T5\*L(t1~6o+@2g1](D/x
答:乙队每天开凿3L0s:J,u(h*l;B;x9B7i米。.T5\*L(t1~6o+@2g1](D/x