For simultaneous equations in variables x and 7, Dx= -63, D=7 then what is x?
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Answer:
apply D value in two main equation,
Dx= 49
(7)x= 49
7x= 49
x= 49/7
x= 7
Dy=-68
(7)y=-68
7y = -68
y = -68/7
Step-by-step explanation:
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