\(\text{Tìm }x\text{ : }\)
\(a,\text{ }2\cdot\left(x-5\right)+3=8\)
\(2\cdot\left(x-5\right)=8-3\)
\(2\cdot\left(x-5\right)=5\)
\(x-5=5\text{ : }2\)
\(x-5=2,5\)
\(x=2,5+5\)
\(x=7,5\)
\(b,\text{ }10-\left(x+1\right)=4\)
\(x+1=10-4\)
\(x+1=6\)
\(x=6-1\)
\(x=5\)
2* (x-5) +3 = 8
A 2* x-5 =8-3
2*x-5 =5
2*x=5-5
2*x=0
x =0/2
x=0
B đề bài sai nhé
A) \(2\times\left(x-5\right)+3=8\)
\(\Rightarrow2\times\left(x-5\right)=8-3\)
\(\Rightarrow2\times\left(x-5\right)=5\)
\(\Rightarrow x-5=5:2\)
\(\Rightarrow x-5=2,5\)
\(\Rightarrow x=2,5+5\)
\(\Rightarrow x=7,5\)
Vậy x = 7,5
B) \(10-\left(x-1\right)=4\)
\(\Rightarrow x-1=10-4\)
\(\Rightarrow x-1=6\)
\(\Rightarrow x=6+1\)
\(\Rightarrow x=7\)
Vậy x = 7
_Chúc bạn học tốt_
