解下列方程.x+5.32=9.5 &n
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解下列方程. x+5.32=9.5 | x-4.3=6.9 | 1.5x=3.6 |
2x++7.8=20 | 6x-2.4×5=27 | 6x+x=26.6. |
(1)x+5.32=9.5
x+5.32-5.32=9.5-5.32
x=4.18
(2)x-4.3=6.9
x-4.3+4.3=6.9+4.3
x=11.2
(3)1.5x=3.6
1.5x÷1.5=3.6÷1.5
x=2.4
(4)2x+7.8=20
2x+7.8-7.8=20-7.8
2x÷2=12.2÷2
x=6.1
(5)6x-2.4×5=27
6x-12=27
6x-12+12=27+12
6x=39
6x÷6=39÷6
x=6.5;
(6)6x+x=26.6
7x=26
7x÷7=26.6÷7
x=3.8.
x+5.32-5.32=9.5-5.32
x=4.18
(2)x-4.3=6.9
x-4.3+4.3=6.9+4.3
x=11.2
(3)1.5x=3.6
1.5x÷1.5=3.6÷1.5
x=2.4
(4)2x+7.8=20
2x+7.8-7.8=20-7.8
2x÷2=12.2÷2
x=6.1
(5)6x-2.4×5=27
6x-12=27
6x-12+12=27+12
6x=39
6x÷6=39÷6
x=6.5;
(6)6x+x=26.6
7x=26
7x÷7=26.6÷7
x=3.8.