Объяснение:
(-4,2)(2х+1/2у)+2,4(у-х)=
= - 8,4х-2,1у+2,4у-2,4х=
= - 10,8х+0,3у
Х=4 1/2=9/2
У= - 1 1/3= - 4/3
-10,8×9/2+0,3×(-4/3)= - 10 8/10×9/2+
+3/10×(-4/3)= - 54/5×9/2-2/5=
= - 27/5×9-2/5= - 243/5-2/5=
= - 245/5= - 49
Объяснение:
(-4,2)(2х+1/2у)+2,4(у-х)=
= - 8,4х-2,1у+2,4у-2,4х=
= - 10,8х+0,3у
Х=4 1/2=9/2
У= - 1 1/3= - 4/3
-10,8×9/2+0,3×(-4/3)= - 10 8/10×9/2+
+3/10×(-4/3)= - 54/5×9/2-2/5=
= - 27/5×9-2/5= - 243/5-2/5=
= - 245/5= - 49