问题
解答题
解方程:
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答案
①16-8x=6.4,
16-8x+8x=6.4+8x,
16=8x+6.4,
16-6.4=8x+6.4-6.4,
8x=9.6,
8x÷8=9.6÷8,
x=1.2;
②2.4x-7×5=13,
2.4x-35+35=13+35,
2.4x=48,
x=20;
③1.4x÷0.8=35,
1.4x÷0.8×0.8=35×0.8,
1.4x=28,
1.4x÷1.4=28÷1.4,
x=20;
④3.2x+1.6x=0.48,
4.8x=0.48,
4.8x÷4.8=0.48÷4.8,
x=0.1.