七年级数学上册解方程专项练习题 7 x 1 —x +—=— 0 .3 x -0 .9 =0 .3 -1 .9 x 6 4 9 2 1 —+7 x =8 +—x 4 (x +9 )+5 (x -5 )=1 7 9 3 1 4 —(3 x -7 )=—x -1 9 x +2 (5 +x )=-2 2 5 y +3 y +3 ——=6 -—— 3 .5 x -7 (x +6 )=1 5 3 5 1 2 —(3 -3 x )=—(3 x -3 ) 5 (6 x -5 )=5 4 9 七年级数学上册解方程专项练习题 5 x 1 —x -—=— 0 .4 x -0 .2 =6 .7 +5 x 6 4 3 4 1 —+5 x =8 +—x 4 (x +9 )-7 (x +9 )=2 0 5 8 1 4 —(4 x -6 )=—x -3 6 x -4 (1 5 +x )=-3 9 5 y +2 y +2 ——=4 +—— 1 x +8 .5 (x +9 )=1 5 4 6 1 2 —(1 +4 x )=—(2 x +3 ) 5 (4 x -4 )=5 7 7 七年级数学上册解方程专项练习题 7 x 1 —x -—=— 0 .5 x -0 .4 =4 .5 -3 .1 x 6 4 3 4 1 —-9 x =8 -—x 5 (x +4 )+9 (x +2 )=1 3 8 1 4 —(2 x -6 )=—x +1 9 x +6 (1 6 +x )=-9 5 5 y +2 y +2 ——=4 +—— 3 .5 x -3 .5 (x -2 )=3 5 4 5 1 2 —(4 +3 x )=—(2 x +5 ) 5 (2 x -4 )=1 3 7 7 七年级数学上册解方程专项练习题 7 x 1 —x +—=— 0 .7 x +0 .1 =1 .8 +7 .8 x 6 2 3 8 1 —+2 x =7 -—x 9 (x +9 )-5 (x +7 )=1 2 5 5 1 4 —(5 x -8 )=—x +9 9 x +8 (1 7 +x )=-9 8 5 y -3 y -3 ——=3 +—— 4 x +2 (x +4 )=5 4 5 1 2 —(4 +3 x )=—(4 x -1 ) 2 (8 x +3 )=4 6 3 七年级数学上册解方程专项练习题 5 x 1 —x -—=— 0 .5 x +0 .8 =9 .1 +8 .7 x 9 8 3 8 1 —+3 x =1 +—x 2 (x -5 )-6 (x -2 )=4 9 8 1 1 —(2 x +5 )=—x -8 5 x -9 (1 9 -x )=-4 2 5 y +2 y +2 ——=3 -—— 4 x +4 .5 (x +5 )=1 0 3 5 1 2 —(1 +3 x )=—(4 x -1 ) 9 (9 x +4 )=7 6 3 七年级数学上册解方程专项练习题 5 x 1 —x +—=— 0 .2 x +0 .6 =0 .7 -5 ....