问题
解答题
5.5-χ=2
χ:0.75=4
2χ+30%χ=9.2.
答案
(1)5.5-χ=2,
5.5-χ+x=2+x,
5.5-2=2+x-2,
x=3.5;
(2)χ:0.75=4,
x=0.75×4,
x=3;
(3)2χ+30%χ=9.2,
2.3x÷2.3=9.2÷2.3,
x=4.
5.5-χ=2
χ:0.75=4
2χ+30%χ=9.2.
(1)5.5-χ=2,
5.5-χ+x=2+x,
5.5-2=2+x-2,
x=3.5;
(2)χ:0.75=4,
x=0.75×4,
x=3;
(3)2χ+30%χ=9.2,
2.3x÷2.3=9.2÷2.3,
x=4.