解方程.x-2.6=4.7 x÷18=3.6 &n
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解方程. x-2.6=4.7 | x÷18=3.6 | 2x+3.4=9.6 |
3x-6×12=24 | 6.8x-0.8x=0.48 | 5(16-x)=35. |
(1)x-2.6=4.7
x-2.6+2.6=4.7+2.6
x=7.3;
(2)x÷18=3.6
x÷18×18=3.6×18
x=64.8;
(3)2x+3.4=9.6
2x+3.4-3.4=9.6-3.4
2x÷2=6.2÷2
x=3.1;
(4)3x-6×12=24
3x-72+72=24+72
3x÷3=96÷3
x=32;
(5)6.8x-0.8x=0.48
6x=0.48
6x÷6=0.48÷6
x=0.08;
(6)5(16-x)=35
5(16-x)÷5=35÷5
16-x+x=7+x
16-7=7+x-7
x=9.
x-2.6+2.6=4.7+2.6
x=7.3;
(2)x÷18=3.6
x÷18×18=3.6×18
x=64.8;
(3)2x+3.4=9.6
2x+3.4-3.4=9.6-3.4
2x÷2=6.2÷2
x=3.1;
(4)3x-6×12=24
3x-72+72=24+72
3x÷3=96÷3
x=32;
(5)6.8x-0.8x=0.48
6x=0.48
6x÷6=0.48÷6
x=0.08;
(6)5(16-x)=35
5(16-x)÷5=35÷5
16-x+x=7+x
16-7=7+x-7
x=9.