2.(x+4)=87-25
=>2.(x+4)=62
=>x+4=62:2
=>x+4=31
=>x=31-4=>x=27
2.(x+4)=87-25
⇔ 2 .(x+4)=62
⇔ x + 4 = 62 : 2
⇔ x + 4 = 31
⇔ x = 31-4
⇔ x = 27
2. ( x+4 )= 62
x+ 4 = 62: 2
x+4 = 31
x= 31-4
x= 27
Vậy x= 27
2.(x+4)=87-25
<=> 2.(x+4)=62
=> x+4=62/2
=>x+4=31
=> x=27
2.(x+4)=87-25
2.(x+4)=62
x+4=62:2
x+4=31
x=31-4
x=27
Vậy x=27