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3 x t. X1 12t x2 120-10t. X1= -10+4t x2=500-20t. X1=20-2t x2=5+t. X1=10-2t х2-6+2t.
X1 12t x2 120-10t. X1= -10+4t x2=500-20t. X1=20-2t x2=5+t. X1=10-2t х2-6+2t.