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4+25x=22x-0.2x=4813x-5=1823x+12x=8420%x=220%X=16X-60%X=2100+50%X=450χ-14χ=24.

题目详情
4+
2
5
x=22
x-0.2x=48
1
3
x-5=18
2
3
x+
1
2
x=84
20%x=2 20%X=16
X-60%X=2 100+50%X=450 χ-
1
4
χ=24.
▼优质解答
答案和解析
(1)4+
2
5
x=22,
4+
2
5
x-4=22-4,
2
5
5
2
=18×
5
2

x=45;

(2)x-0.2x=48,
0.8x=48,
0.8x÷0.8=48÷0.8,
x=60;

(3)
1
3
x-5=18,
1
3
x-5+5=18+5,
1
3
x×3=23×3,
x=69;

(4)
2
3
x+
1
2
x=84,
7
6
x =84,
7
6
6
7
=84×
6
7

x=72;

(5)20%x=2,
0.2x÷0.2=2÷0.2,
x=10;

(6)20%x=16,
0.2x÷0.2=16÷0.2,
x=80;

(7)x-60%x=2,
0.4x=2,
0.4x÷0.4=2÷0.4,
x=5;

(8)100+50%x=450,
100+0.5x-100=450-100,
0.5x÷0.5=350÷0.5,
x=700;

(9)x-
1
4
x=24,
3
4
x =24,
3
4
x ×
4
3
=24×
4
3

x=32.