六年级解方程练习题 x- x -4= 21 2X + = X X=45 25 35 27 43X =20 X- X=400 X = 534183986155X3 X 12 X 12217532413241X( + )= 8341X16 38 1312 8341XX = X= 4X6 =272169861532X= X+ X=42 X21 =4 125 310 32110332X X=2041x1054x87434X6 =2 X- X= X X= 3225 13 310 27 43X X121 x + x = 4 X =8321654281
