甲、乙、丙三个组共有图书90本。如果乙组向甲组借3本后,又送给丙组5本,结果三个组所有图书刚好相等,问甲、乙、丙三个组原有图书多少本?3S(m4P.i6{)f(q3^4|(E:b
算式:提示*H(n;_,{3_+V(h9|5x
答:原来甲组有9^-u(Y5q9b;|0w-r8q*V8_,|(P7J0g*X本,乙组有*K*z*B2i2N*L*G本,丙组有1b'E*f1f+^(w本。3S(m4P.i6{)f(q3^4|(E:b