8x=7,8x+25
8x-7,8x=25
0,2x=25
1/5x=25
x=25:1/5
x=25.5
x=125
k cho mik nha
Ta có: ( 7,5 + 0,5x ) = 8x
=> 0,5x = 25
=> x = 50
Đúng rồi đoá
Trả lời
\(8x=7,5x+25\)
\(\Rightarrow8x-7,5x=25\)
\(\Rightarrow x\left(8-7,5\right)=25\)
\(\Rightarrow x.0,5=25\)
\(\Rightarrow x=25:0,5\)
\(\Rightarrow x=50\)
Vạy x=50
7,5x + 25 = 8x
7,5x + 25 - 8x = 0
7,5x - 8x + 25 = 0
(7,5-8)x + 25= 0
-0,5x + 25 = 0
-0,5x = -25
x= -25 : -0,5
x= 50
8x = 7,5x + 25
8x - 7,8x = 25
0,2x = 25
1/5x = 25
x = 25 chia 1/5
x = 25 *5
x = 125