问题
解答题
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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.