Given:-
- 5x + y = 24 .... eqⁿ 1
- -5x -4y = -56 .... eqⁿ 2
now, add the eqⁿ 1 to eqⁿ ∼
5x + y = 24
-5x - 4y = -56
————————
5y = 80
y = 80/5
y = 16
now , put the value of y = 16 in eqⁿ 2 ∼
- 5x + y = 24
- 5x + 16 = 24
- 5x = 24 - 16
- 5x = 8
- x = 8/5
or
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hope it helps! :)