2十1.8一5)(=3.6

0.04

2+1.8-5x=3.6

5x=3.8-3.6;5x=0.2;x=0.04

一5x=3.6一1.8一2,一5x=一0.2,x=1/25

5x-2 1.8 3.6 方程

5x-2+1.8=3.6,
5x=3.6-1.8+2,
5x=3.8,
x=0.76

5x-2+1.8=3.6怎麼做

5x-0.2=3.6
5x=3.8
x=3.8/5
=0.76

(-1.8)十3.6一7.2十2.4怎麼做

(-1.8)十3.6一7.2十2.4
=(-1.8)-7.2+3.6+2.4
=(-1.8-7.2)+(3.6+2.4)
=-9+6
=-3

3.2+1.8-5X=3.6

你想幹什麼?求x的值?
3.2+1.8-3.6=5x
1.4=5x
所以x=0.28

解方程.(1)x:6= 2 5 (2)3.6x=1.8×3 (3)2

(1)x:6=

2
5

5x=6×2,
5x÷5=12÷5,
x=2.4;

(2)3.6x=1.8×3,
3.6x=5.4,
3.6x÷3.6=5.4÷3.6,
x=1.5;

(3)276×4=368x,
1104=368x,
1104÷368=368x÷368,
x=3;

(4)

8
21

=

0.4
x


8x=21×0.4,
8x÷8=8.4÷8,
x=1.05.

2·5x-3.6=x十3.6怎麼算

2.5x-3.6=x+3.6
解: 移項得,2.5x-x=3.6+3.6
合併同類項得,1.5x=7.2
未知數係數化為一得,x=4.8

21.6÷(1.8十3.6)簡便

21.6÷(1.8十3.6)
=21.6÷5.4
=4x5.4÷5.4
=4

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