$12.(x-1):3=26+23$ $↔12.(x-1):3=49$ $↔12.(x-1)=49.3=147$ $↔x-1=\dfrac{147}{12}$ $→x=\dfrac{147}{12}+1=\dfrac{53}{4}$ Reply
$12.(x-1):3=26+23$
$↔12.(x-1):3=49$
$↔12.(x-1)=49.3=147$
$↔x-1=\dfrac{147}{12}$
$→x=\dfrac{147}{12}+1=\dfrac{53}{4}$
`=> 12(x-1):3=49`
`=> 12(x-1)=49.3=147`
`=> x-1=147:12=12,25`
`=> x=12,25+1=13,25`