问题 解答题
解方程:
①6x-0.9=4.5②2(x-3)=5.8③1.6x=6.4
④4x-3×9=29⑤16+8x=40⑥x÷1.1=3.
答案

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.

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