(1) 0.2X+0.2*4.8=11.2(2) X/0.5-2.25=0.75(3)5*(X+2)-78=2
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![(1) 0.2X+0.2*4.8=11.2(2) X/0.5-2.25=0.75(3)5*(X+2)-78=2](/uploads/image/z/6896996-44-6.jpg?t=%281%29+0.2X%2B0.2%2A4.8%3D11.2%282%29+X%2F0.5-2.25%3D0.75%283%295%2A%28X%2B2%29-78%3D2)
(1) 0.2X+0.2*4.8=11.2(2) X/0.5-2.25=0.75(3)5*(X+2)-78=2
(1) 0.2X+0.2*4.8=11.2
(2) X/0.5-2.25=0.75
(3)5*(X+2)-78=2
(1) 0.2X+0.2*4.8=11.2(2) X/0.5-2.25=0.75(3)5*(X+2)-78=2
(1)等式两边扩大相同倍数100倍即:20X+96=1120 那么20X=1120-96 得X=51.2
(2)首先简化一下X/0.5就是2X 那么2X=0.75+2.25 得X=3/2
(3)首先分解括号即:5X+10=2+78 继续分解5X=2+78+10 得X=18
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0.2X+0.96=11.2
0.2X=10.24
X=51.2
X/0.5=3
X=6
5*(X+2)=80
X+2=16
X=14
1.0.2X+9.6=11.2
0.2X =11.2-9.6
0.2X =1.6
0.2 =8
(1)0.2X+0.2*4.8=11.2
0.2X+0.96=11.2
0.2X=10.24
X=51.2
(2) X/0.5-2.25=0.75
X/0.5=3
X=6
(3) 5*(X+2)-78=2
5*(X+2)=80
X+2=16
X=14
1) 0.2X+0.2*4.8=11.2
(2) X/0.5-2.25=0.75
(3)5*(X+2)-78=2
0.2X+0.2*4.8=1