12 x ( x – 1) : 3 = 26 + 23 Question 12 x ( x – 1) : 3 = 26 + 23 in progress 0 Môn Toán Verity 4 years 2020-10-15T11:35:52+00:00 2020-10-15T11:35:52+00:00 2 Answers 99 views 0
Answers ( )
$12.(x-1):3=26+23$
$↔12.(x-1):3=49$
$↔12.(x-1)=49.3=147$
$↔x-1=\dfrac{147}{12}$
$→x=\dfrac{147}{12}+1=\dfrac{53}{4}$
`=> 12(x-1):3=49`
`=> 12(x-1)=49.3=147`
`=> x-1=147:12=12,25`
`=> x=12,25+1=13,25`