5x2x=2.7求解方程
5x-2x=2.7 (解方程 ) -
2x=2.7 X=2.7/2 X=1.35
5x-2x=2.7 解：3x=2.7 3x/3=2.7/3 x=0.9
2x=2.7 X=2.7/2 X=1.35
5x-2x=2.7 解：3x=2.7 3x/3=2.7/3 x=0.9
5X-2X=2.7 (5-2)X=2.7 3X=2.7 X=2.7/3 X=0.9
5x-2x=2.7 (5-2)x=2.7 3x=2.7 x=0.9
5x=2x+2、7 -
回答：5x-2x=2.7 3x=2.7 x=0.9
合并同类项得7x=27 两边同时除以7得x=27/7 =3又6/7
2x+2.7=5x怎么解? -
解：2x+2.7=5x 2.7=5x-2x 2.7=3x X=0.9
7X=5.6 X=0.8
2x+5x=2.8的解方程 要按照数学书里的步骤!!! -
2X+5X=2.8 解：（2+5）X=2.8 X=2.8/7=0.4 10(X-15)=1.8 解：X-15=1.8/10 X-15=0.18 X=15.18 (X+2.4)/4=1.6 解：X+2.4=1.6*4 X+2.4=6.4 X=6.4-2.4=4
5x=2x 5x-2x=0 3x=0 x=0