a) =>x=41.10.12=4920
b) =>x.90=270
=>x=\(\dfrac{270}{90}=3\)
x:10:12=41
<=>x:10=41x12
<=>x:10=492
<=>x=492x10
<=>x=4920
x*15*6=270
<=>x*15=270:6
<=>x*15=45
<=>x=45:15
<=>x=3
\(a,x:10:12=41\\ x:10=41\times12\\ x:10=492\\ x=492\times10\\ x=4920\\ ----\\ b,x\times15\times6=270\\ x\times15=270:6\\ x\times15=45\\ x=45:15\\ x=3\)
X=41 x 12 x 10 = 4920
X= 270 : 6 : 15 = 3
*) x : 10 : 12 = 41
x : 10 = 41 × 12
x : 10 = 492
x = 492 × 10
x = 4920
*) x × 15 × 6 = 270
x × 15 = 270 : 6
x × 15 = 45
x = 45 : 15
x = 3
