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4x-10y=-4
4x-3y =9 -
-7y = -13
y = 13/7
4x-3y=9
4x-3(13/7)=9
4x-39=63
4x=102
x=25.5
B.
6x+y=2
6x-4y=22 -
5y = -20
y =-4
6x-4(-4)=22
6x +16=22
6x = 6
x =1