Х^2-4х=х^2+6х+9
х^2-х^2-4х-6х=9
-10х=9
х=-0,9
10
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Ордината - значение y
Абсцисса - значение x
1) y = 2
-2x + 3y = 12
-2x + 3*2 = 12
-2x + 6 = 12
-2x = 12 - 6
-2x = 6
x = 6 : (-2)
x = -3
2) x = 3
-2x + 3y = 12
-2*3 + 3y = 12
-6 + 3y = 12
3y = 12 + 6
3y = 18
y = 18 : 3
y = 6
Х=39/14*16*3:13/21=(39*16*21)/(14*3*13)=24
(1595/27+326)*60 = 23104 12/27
1595/27 = 59 2/27
1) 59 2/27+326 = 385 2/27
2) 385 2/27*60 = 23104 12/27