Question

answer this question.

Answer 1

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Answer 2

Answer:

Step-by-step explanation:

Given that,

152 x - 378 y = -74            ........1

-378 x + 152 y = -604        ........2

Adding equations 1 and 2,

152 x - 378 y - 378 x + 152 y = -74-604

or 152(x+y) - 378(x+y) = -678

or -226(x+y) = -678

or x+y =-678/-226 = 3

Subtracting equation 2 from 1,

152 x - 378 y +378 x - 152 y = -74+604

or 152(x-y) + 378(x-y) = 530

or 530(x-y) 530

or x-y = 530/530 =1

Thus, x+y=3 and x-y =1

Therefore x+y : x-y = 3/1 =3

Answer is 3