a) 195 - x: 17 = 125
x : 17 = 195 - 125 = 70
x = 70 . 17
x = 1190
b) 32 . 15 : 2 = (x + 70) : 14 - 40
240 = ( x + 70) : 14 - 40
(x + 70) : 14 = 280
x + 70 = 280 . 14 = 3920
x = 3920 - 70
x = 3850
A)195-x:17=125
=\(x:17=195-125\)
\(x:17=70\)
\(x=70.17\)
=>x=\(1190\)
B) 32.15:2=(x+70):14-40
\(\text{B) 32.15:2=(x+70):14-40}\)
\(=480:2=\left(x+70\right):14-40\)
\(=\left(x+70\right):14-40=240\)
\(=\left(x+70\right):14=240+40\)
\(\left(x+70\right):14=280\)
=>\(x+70=280.14\)
\(x+70=3920\)
=> x=\(3920-70\)
=>x=\(3850\)
a) 195 - x : 7 = 125
x : 7 = 195 - 125
x : 7 = 70
x = 70 x 7
x = 140.
b) 32 x 15 : 2 = ( x + 70 ) : 14 - 40
480 : 2 = ( x + 70 ) : 14 - 40
240 = ( x + 70 ) : 14 - 40
( x + 70 ) : 14 - 40 = 240
( x + 70 ) : 14 = 240 - 40
( x + 70 ) : 14 = 200
x + 70 = 200 x 14
x + 70 = 2800
x = 2800 - 70
x = 2100.
a) 195-x:17=125 b) 32.15:2=(x+70):14-40
x:17=195-125 480:2=(x+70):14-40
x:17=70 240=(x+70):14-40
x= 70.17 suy ra (x+70):14-40=240
x=1190 (x+70);14=240+40
(x+70):14=280
(x+70)=280.14
x+70=3920
x= 3920-70
x=3850
x+70=3360
x=3360-70
x =3290
