Ответ:
a) 2y= 3x =>
6x-4(3x)=-12
-6x=-12
x=2
b) 2x=3+9y =>
-(3+9y)+5y=-7
-3-9y+5y=-7
4y=-4
y=-1
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Ответ:
a) 2y= 3x =>
6x-4(3x)=-12
-6x=-12
x=2
b) 2x=3+9y =>
-(3+9y)+5y=-7
-3-9y+5y=-7
4y=-4
y=-1