解下列方程 x-4.8=19.32 4.34+x=6.27 6.5-x=3.5 4.8÷x=1.2 3.6x=2.88 x÷0.96=4.5 5x+3=
解下列方程x-4.8=19.324.34+x=6.276.5-x=3.54.8÷x=1.23.6x=2.88x÷0.96=4.55x+3=484x-20=0.82.4-3...
解下列方程 x-4.8=19.32 4.34+x=6.27 6.5-x=3.5 4.8÷x=1.2 3.6x=2.88 x÷0.96=4.5 5x+3=48 4x-20=0.8 2.4-3x=0.3 3x-12×3=24 5x+7x=84 1.2×4+6x=13.8 8x-4x=60 x-0.76x=0.48 7x÷3=8.19.
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(1)x-4.8=19.32
x-4.8+4.8=19.32+4.8
x=24.12;
(2)4.34+x=6.27
4.34+x-4.34=6.27-4.34
x=1.93;
(3)6.5-x=3.5
6.5-x+x=3.5+x
6.5-3.5=3.5+x-3.5
x=3;
(4)4.8÷x=1.2
4.8÷x×x=1.2×x
4.8÷1.2=1.2x÷1.2
x=4;
(5)3.6x=2.88
3.6x÷3.6=2.88÷3.6
x=0.8;
(6)x÷0.96=4.5
x÷0.96×0.96=4.5×0.96
x=4.32;
(7)5x+3=48
5x+3-3=48-3
5x÷5=45÷5
x=9;
(8)4x-20=0.8
4x-20+20=0.8+20
4x÷4=20.8÷4
x=5.2;
(9)2.4-3x=0.3
2.4-3x+3x=0.3+3x
2.4-0.3=0.3+3x-0.3
2.1÷3=3x÷3
x=0.7;
(10)3x-12×3=24
3x-36+36=24+36
3x÷3=60÷3
x=20;
(11)5x+7x=84
12x=84
12x÷12=84÷12
x=7;
(12)1.2×4+6x=13.8
4.8+6x-4.8=13.8-4.8
6x÷6=9÷6
x=1.5;
(13)8x-4x=60
12x=60
12x÷12=60÷12
x=5;
(14)x-0.76x=0.48
0.24x=0.48
0.24x÷0.24=0.48÷0.24
x=2;
(15)7x÷3=8.19
7x÷3×3=8.19×3
7x÷7=24.57÷7
x=3.51.
x-4.8+4.8=19.32+4.8
x=24.12;
(2)4.34+x=6.27
4.34+x-4.34=6.27-4.34
x=1.93;
(3)6.5-x=3.5
6.5-x+x=3.5+x
6.5-3.5=3.5+x-3.5
x=3;
(4)4.8÷x=1.2
4.8÷x×x=1.2×x
4.8÷1.2=1.2x÷1.2
x=4;
(5)3.6x=2.88
3.6x÷3.6=2.88÷3.6
x=0.8;
(6)x÷0.96=4.5
x÷0.96×0.96=4.5×0.96
x=4.32;
(7)5x+3=48
5x+3-3=48-3
5x÷5=45÷5
x=9;
(8)4x-20=0.8
4x-20+20=0.8+20
4x÷4=20.8÷4
x=5.2;
(9)2.4-3x=0.3
2.4-3x+3x=0.3+3x
2.4-0.3=0.3+3x-0.3
2.1÷3=3x÷3
x=0.7;
(10)3x-12×3=24
3x-36+36=24+36
3x÷3=60÷3
x=20;
(11)5x+7x=84
12x=84
12x÷12=84÷12
x=7;
(12)1.2×4+6x=13.8
4.8+6x-4.8=13.8-4.8
6x÷6=9÷6
x=1.5;
(13)8x-4x=60
12x=60
12x÷12=60÷12
x=5;
(14)x-0.76x=0.48
0.24x=0.48
0.24x÷0.24=0.48÷0.24
x=2;
(15)7x÷3=8.19
7x÷3×3=8.19×3
7x÷7=24.57÷7
x=3.51.
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