Question

4. Tìm x biết :
a) (125 + x) + 68 = 236 
 

b) 2x - 1= 123

 

Answer 1

a) \(\left(125+x\right)+68=236\)

\(\Rightarrow125+x=236-68\)

\(\Rightarrow125+x=168\)

\(\Rightarrow x=168-125\)

\(\Rightarrow x=43\)

b) \(2x-1=123\)

\(\Rightarrow2x=124\)

\(\Rightarrow x=\frac{124}{2}=62\)

Answer 2

 

4. Tìm x biết :
a) (125 + x) + 68 = 236

(125 + x) = 236 - 68

(125 + x) = 168

 

x = 168-125

x= 43

b) 2x - 1= 123