18+(2x+24) = 56
2x+24 = 56-18
2x+24 = 38
2x = 38-24
2x = 14
x = 14:2
x = 7
Ta có:
18 + ( 2x + 24 ) = 56
=>18 + 2x + 24 = 56
=> 2x = 56 - 24 - 18
=> 2x = 14
=> x = 14 : 2
=> x = 7
Vậy: x = 7
18+(2x+24)=56
2x+24=56-18
2x+24=38
2x=38-24
2x=14
x=14:2
x=7
K mk nha!
18+(2x+24)=56
(2x+24)=56-18
2x+24=38
2x = 38-24
2x =14
x =14:2
x =7
\(18+\left(2x+24\right)=56\)
\(2x+24=56-18\)
\(2x+24=38\)
\(2x=38-24\)
\(2x=14\)
\(x=14\div2\)
\(\Rightarrow x=7\)
CHÚC HỌC TỐT !!!
18 + ( 2x + 24 ) = 56
2x + 24 = 56 - 18
2x + 24 = 38
2x = 38 - 24
2x = 14
x = 14 : 2
x = 7
18 + ( 2x + 24 ) = 56
2x + 24 = 56 - 18
2x + 24 = 38
2x + 24 = 38 - 24
2x + 24 = 12 + 2
.................. = 7
đs...