解方程: ①6x-0.9=4.5 ②2(x-3)=5.8 ③1.6x=6.4 ④4x-3×9=29 ⑤16+8x=40
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解方程:
①6x-0.9=4.5 | ②2(x-3)=5.8 | ③1.6x=6.4 |
④4x-3×9=29 | ⑤16+8x=40 | ⑥x÷1.1=3. |
![解方程: ①6x-0.9=4.5 ②2(x-3)=5.8 ③1.6x=6.4 ④4x-3×9=29 ⑤16+8x=40](/uploads/image/z/18193138-34-8.jpg?t=%E8%A7%A3%E6%96%B9%E7%A8%8B%EF%BC%9A+%E2%91%A06x-0.9%3D4.5+%E2%91%A12%EF%BC%88x-3%EF%BC%89%3D5.8+%E2%91%A21.6x%3D6.4+%E2%91%A34x-3%C3%979%3D29+%E2%91%A416%2B8x%3D40)
①6x-0.9=4.5,
6x-0.9+0.9=4.5+0.9,
6x=5.4,
6x÷6=5.4÷6,
x=0.9;
②2(x-3)=5.8,
2(x-3)÷2=5.8÷2
x-3=2.9,
x-3+3=2.9+3,
x=5.9;
③1.6x=6.4,
1.6x÷1.6=6.4÷1.6,
x=4;
④4x-3×9=29,
4x-27=29,
4x-27+27=29+27,
4x=56,
4x÷4=56÷4,
x=14;
⑤16+8x=40,
16+8x-16=40-16,
8x=24,
8x÷8=24÷8,
x=3;
⑥x÷1.1=3,
x÷1.1×1.1=3×1.1,
x=3.3.
6x-0.9+0.9=4.5+0.9,
6x=5.4,
6x÷6=5.4÷6,
x=0.9;
②2(x-3)=5.8,
2(x-3)÷2=5.8÷2
x-3=2.9,
x-3+3=2.9+3,
x=5.9;
③1.6x=6.4,
1.6x÷1.6=6.4÷1.6,
x=4;
④4x-3×9=29,
4x-27=29,
4x-27+27=29+27,
4x=56,
4x÷4=56÷4,
x=14;
⑤16+8x=40,
16+8x-16=40-16,
8x=24,
8x÷8=24÷8,
x=3;
⑥x÷1.1=3,
x÷1.1×1.1=3×1.1,
x=3.3.
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