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{-(b-3)=a+1
{-(2b-7)=2a-3b
{-b+3=a+1
{-2b+7=2a-3b
{-a-b= -2
{-2a+b= -7
___________
-3a= -9
a=3
{a=3
{-3-b= -2
{-b=1
{b= -1
SPRADZENIE:
* -(b-3)=a+1
-(-1-3)=3+1
-(-4)=3+1
4=4
* -(2b-7)=2a-3b
-(-2-7)=6-3*(-1)
-(-9)=6+3
9=9
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{-(b-3)=a+1
{-(2b-7)=2a-3b
{-b+3=a+1
{-2b+7=2a-3b
{-a-b= -2
{-2a+b= -7
___________
-3a= -9
a=3
{a=3
{-a-b= -2
{a=3
{-3-b= -2
{a=3
{-b=1
{a=3
{b= -1
SPRADZENIE:
* -(b-3)=a+1
-(-1-3)=3+1
-(-4)=3+1
4=4
* -(2b-7)=2a-3b
-(-2-7)=6-3*(-1)
-(-9)=6+3
9=9