Question

the solution of the equation x-y=10 and x+y=70 is​

Answer 1

Answer:

(x,y) = (40, 30)

Step-by-step explanation:

  x-y=10

 x+y=70

---------------

 2x  = 80

∴ x = $\frac{80}{2}$ = 40

given   x-y=10

substituting the value of x

 40-y=10

∴ y = 40 -10 = 30

Answer 2

Step-by-step explanation:

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