Question

The solution of the equation x-y=10
and X+4= 70 is..​

Answer 1

Answer:

The answer is that

2x-4y=80

Answer 2

Answer:

x-y=10______(1)

X+y=70_____(2)

=>ADD EQUATION 1 & 2

=> x - y = 10

+ x + y = 70

_________________

2x = 80

=> x=80/2

=> x= 40

PUT X= 40 IN EQUATION (1)

=> (40)-y=10

=> 40-y=10

=> y=40-10

=> y = 30

(x,y)=(40,30)

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