15X-2.5=11.5 3(x+2)=39 x-3/5x=6/5 4.9÷7/2-5x=0.8 8/5÷x=16 4x
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15X-2.5=11.5 3(x+2)=39 x-3/5x=6/5 4.9÷7/2-5x=0.8 8/5÷x=16 4x1.25-6x=3.2
写完全对再加分
15X-2.5=11.5 3(x+2)=39 x-3/5x=6/5 4.9÷7/2-5x=0.8 8/5÷x=16 4x1.25-6x=3.2 是方程啊
写完全对再加分
15X-2.5=11.5 3(x+2)=39 x-3/5x=6/5 4.9÷7/2-5x=0.8 8/5÷x=16 4x1.25-6x=3.2 是方程啊
15X-2.5=11.5
15X=11.5+2.5
15X=14
X=14/15;
3(x+2)=39
X+2=39/3
X+2=13
X=13-2
X=11
x-(3/5)x=6/5
(5/5-3/5) x=6/5
(2/5)x=6/5
2x=6
x=6/2
x=3
4.9÷7/2-5x=0.8
0.7/2=5x+0.8
5x=0.7/2-0.8
5x=0.35-0.8
x=-0.45/5=-0.09
8/5÷x=16
8/5=16x
x=(8/5)/16 =1/10
4*1.25-6x=3.2
5-6x=3.2
6x=5-3.2
6x=1.8
x=1.8/6=0.3
4X×1.25-6X=3.2
5X-6X=3.2
-X=3.2
X=-3.2
15X=11.5+2.5
15X=14
X=14/15;
3(x+2)=39
X+2=39/3
X+2=13
X=13-2
X=11
x-(3/5)x=6/5
(5/5-3/5) x=6/5
(2/5)x=6/5
2x=6
x=6/2
x=3
4.9÷7/2-5x=0.8
0.7/2=5x+0.8
5x=0.7/2-0.8
5x=0.35-0.8
x=-0.45/5=-0.09
8/5÷x=16
8/5=16x
x=(8/5)/16 =1/10
4*1.25-6x=3.2
5-6x=3.2
6x=5-3.2
6x=1.8
x=1.8/6=0.3
4X×1.25-6X=3.2
5X-6X=3.2
-X=3.2
X=-3.2
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