问题 解答题
2.8x-15.6=26.41.2x÷2=60(x-4)×0.5=10
4X+1.2×5=24.48X-5X=27x÷2×2.5=20.
答案

(1)2.8x-15.6=26.4,

2.8x-15.6+15.6=26.4+15.6,

2.8x=42,

2.8x÷2.8=42÷2.8,

x=15;

(2)1.2x÷2=60,

1.2x÷2×2=60×2,

1.2x=120,

1.2x÷1.2=120÷1.2,

x=100;

(3)(x-4)×0.5=10,

(x-4)×0.5÷0.5=10÷0.5,

x-4=20,

x-4+4=20+4,

x=24;

(4)4X+1.2×5=24.4,

4x+6-6=24.4-6,

4x=18.4,

4x÷4=18.4÷4,

x=4.6;

(5)8X-5X=27,

3x=27,

3x÷3=27÷3,

x=9;

(6)x÷2×2.5=20,

1.25x=20,

1.25x÷1.25=20÷1.25,

x=16.

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