题目内容
解方程
| 2.5x=0.75 | 2x-1.2×3=6.2 | 6x+1.5x=15. |
①2.5x=0.75,
2.5x÷2.5=0.75÷2.5,
x=0.3.
②2x-1.2×3=6.2,
2x-3.6=6.2,
2x-3.6+3.6=6.2+3.6,
2x=9.8,
2x÷2=9.8÷2,
x=4.9.
③6x+1.5x=15,
7.5x=15,
7.5x÷7.5=15÷7.5,
x=2.
2.5x÷2.5=0.75÷2.5,
x=0.3.
②2x-1.2×3=6.2,
2x-3.6=6.2,
2x-3.6+3.6=6.2+3.6,
2x=9.8,
2x÷2=9.8÷2,
x=4.9.
③6x+1.5x=15,
7.5x=15,
7.5x÷7.5=15÷7.5,
x=2.
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