Câu 1:71+(26-3x):5=75
=>(26-3x):5=75-71
=>26-3x=4*5
=>3x=26-20
=>x=6:3
=>x=2
Câu 2:3636:(12x-91)=36
=>12x-91=3636:36
=>12x=101+91
=>x=192:12
=>x=16
Câu 1 :\(71+\left(26-3xX\right):5=75\)
\(\left(26-3xX\right):5=75-71\)
\(\left(26-3xX\right):5=4\)
\(26-3xX=4x5\)
\(26-3xX=20\)
\(3xX=26-20\)
\(3xX=6\)
\(X=6:3\)
\(X=2\)
Câu 2 : \(3636:\left(12xX-91\right)=36\)
\(12xX-91=101\)
\(12xX=101+91\)
\(12xX=192\)
\(X=192:12\)
\(X=16\)
Câu 1:
\(71+\left(26-3x\right):5=75\)
\(\left(26-3x\right):5=75-71\)
\(\left(26-3x\right):5=4\)
\(26-3x=4\times5\)
\(26-3x=20\)
\(3x=26-20\)
\(3x=6\)
\(x=6:3\)
\(x=2\)
Câu 2:
\(3636:\left(12x-91\right)=36\)
\(12x-91=3636:36\)
\(12x-91=101\)
\(12x=101+91\)
\(12x=192\)
\(x=192:12\)
\(x=16\)
