5,2*(8,4 + 3,6) - 8,2*(8,4 + 3,6)=(8,4<span>+ 3,6)*(5,2 - 8,2)=12*(-3)=-36</span>
<=>{x=3-y <=>{y=7 <=>{y=7
{3*3-y=13 {×=3-y {×=-4
__________ ______
-y=13-6 x=3-7
-y=7 x=-4
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А)(х-1)+(12-7,5х)=x-1+12-7,5x=11-6,5x
X=(x₂-x₁)/2+x₁, x₂=-3;x₁=7;
x=(-3-7)/2+7=-5+7=2 абсцисса точки Р =2