有含盐8%的盐水40千克，要配制含盐20%的盐水100千克。需要加盐和水各多少千克？;m.~9z.z-|3t'D9l'o-w0n6C1W,U.d
算式：提示8?9P7V/b4m+m4m/w+j3D;m.~9z.z-|3t'D9l'o-w0n6C1W,U.d
答：需要加盐和水各多.R7v*`*o/J,t6i2v9s*I9o,x千克。;m.~9z.z-|3t'D9l'o-w0n6C1W,U.d