142+(y×5-31500)+98000-36100=14848×5
142+(y×5-31500)+98000-36100=742400
142+(y×5-31500)+98000=742400+36100
142+(y×5-31500)+98000=778500
142+(y×5-31500)=778500-98000
142+(y×5-31500)=680500
(y×5-31500)=680500-142
(y×5-31500)=680358
y×5=680358+31500
y×5=711858
y=711858:5
y=142371,6
vậy y=142371,6
14200 + ( y x 5 - 31500) + 98000 - 36100 : 5 = 148480
14200 + ( y x 5 - 31500 ) + 98000 - 7220 = 148480
14200 + ( y x 5 - 31500 ) + 98000 = 148480 + 7220
14200 + ( y x 5 - 31500 ) + 98000 = 155700
14200 + ( y x 5 - 31500 ) = 155700 - 98000
14200 + ( y x 5 - 31500 ) = 57700
y x 5 - 31500 = 57700 - 14200
y x 5 - 31500 = 43500
y x 5 = 43500 + 31500
y x 5 = 75000
y = 75000 : 5
y = 15000
Vậy y = 15000
\(\text{14200 + (y . 5 - 31500) + 98000 - 36100 : 5= 148480}\)
\(14200+\left(y.5-31500\right)+98000-7220=148480\)
\(\text{14200 + (y . 5 - 31500) + 98000 = 148480 + 7220}\)
\(\text{14200 + (y . 5 - 31500) + 98000}=155700\)
\(\text{14200 + (y . 5 - 31500)}=155700-98000\)
\(\text{14200 + (y . 5 - 31500)}=57700\)
\(\text{y . 5 - 31500}=57700-14200\)
\(\text{y . 5 - 31500}=43500\)
\(y.5=43500+31500\)
\(y.5=75000\)
\(y=75000:5\)
\(y=15000\)
P\S: Dấu chấm là dấu nhân
