Question

2x + 5y = 12 and x - 5y = 4​

Answer 1

Answer:

2x + 5y = 12 and x - 5y = 4

: 2x + 5y = 12

: 2x - 5y = 12 - 10y

: (x - 5y) + x = 12 - 10y

: x + 4 = 12 - 10y

: (x - 5y) + 4 = 12 - 15y

: 12 - 15y = 8

: 15y = 4

: y = 4/15

2x + 5(4/15) = 12

: 2x + 4/3 = 12

: 2x = 32/3

: x = 16/3

Hence, x = 16/3 and y = 4/15

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