Question

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

Answer 1

Sorry I don't know how to

Answer 2

X - Y = 10 ( equation 1)

X + Y = 70 ( equation 2)

Adding both equation

(X - Y = 10) + ( X + Y = 70)

2X = 80

X = 80

2

x = 40

Putting the value of X in any of the equation

X - Y = 10

40 - Y = 10

-Y = 10 - 40

-Y = -30

y = 30

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