51 + (26 - 3x) : 5 = 55
(26 - 3x) : 5 = 4
26 - 3x = 20
3x = 26 - 20 = 6
x = 6 : 3
x = 2
54+(26-3x):5=55
26-3x:5=55-51
26-3x:5=4
26-3x=4x5
26-3x=20
3x=26-20
3x=6
x=6:3
x=2
Tích mình nhá
Giải:
51+(26-3x):5=55
(26-3x):5=55-51
(26-3x):5=4
(26-3x)=4*5
(26-3x)=20
3x=26-20
3x=6
x=6:3
x=2
\(51+\left(26-3x\right):5=55\)
\(\left(26-3x\right):5=55-51\)
\(\left(26-3x\right):5=4\)
\(26-3x=4.5\)
\(26-3x=20\)
\(3x=26-20\)
\(3x=6\)
\(x=2\)
51+(26-3x):5=55
(26-3x):=55-51
(26-3x):5=4
26-3x =4x5
26-3x =20
3x =26-20
3x =6
x =6:3
x =2
51+(26—3x):5=55
26—3x=55:5—51
26—3x=20
3x=6
x=2
x.1/2+3/2.x=4/5
x.(1/2+3/2)=4/5
x.4/2=4/5
x.2=4/5
x =4/5:2
x =4/10=2/5
51+(26-3x):5=55
=>(26-3x):5 =55-5
=>(26-3x):5 =4
=>(26-3x) =4x5
=>26-3x =20
=> 3x =26-20
=> 3x =6
=> x =2