---------------------------------------------
4x-y-24=10x-4y
3y-2=4-x+y
-6x+3y-24=0
2y-6+x=0
X=-2y+6
-6(-2y+6)+3y-24=0
12y-36+3y-24=0
15y=60
Y=4
X=-2•4+6=-2
6a+7b3a−4b, если
a=1,2, b=5,4
6a+7b3a−4b= 6*1,2+(7*5,4)*(3*1,2)-4*5,4=7,2+(37,8)*(3.6)-21,6= 7,2+136,08-21,6=143,28-21,6=121,68