Question

solve xand y x+y=7
5x + 12y =7​

Answer 1

Step-by-step explanation:

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Answer 2

Answer:

x + y = 7--------Equation 1 (multiply by 5)

5x + 12y = 7--------Equation 2 (multiply by 1)

We get,

5x + 5y = 35

5x + 12y = 7

Now we change signs,

5x +5y = 35

-5x -12y = -7

Now we get,

-7y = 28

y = 28/ -7

y = -4

Now we substitute y's value in equation 1,

x + y = 7

x + -4 =7

x = 7+4

x = 11

Therefore x = 11 and y = -4

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