Question

七上数学计算题求解。

4（y-2）- {5（1-2y）- 4(5y-1)}=0。

Answer 1

4（y-2）败蠢- {5（氏历1-2y）- 4(5y-1)}=0
4y-8-(5-10y-20y+4)=0
4y-8-(9-30y)=0
4y-8-9+30y=0
4y+30y=8+9
34y=17
y=17/34
y=1/歼枯搜2

Answer 2

0花开0若相惜0 ，余隐塌你好！
4（y-2）- {5（竖圆1-2y）- 4(5y-1)}=0
=>4（y-2）- {5-10y- 20y+4)}=0
=>4y-8- {9-30y}=0
=>34y-17=0
=>携粗y=17/34=1/2

Answer 3

4y-8-（5-10y-20y+4）=0
4y-8-9+30y=0
34y=17
y=0.5

Answer 4

4y-8-[5-10y-20y+4]=0
4y-8-5+10y+20y-4=0
34y-17=0
34y=17
y=1/2

Answer 5

4y-8-[5-10y-20y+4]=0
解得：y=1/2或0.5