49 x minus 57 Y is equals to 172; 57 x minus 49 Y is equals to 252
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49x - 57y = 172 ----------(1)
57x - 49y = 252-----------(2)
adding--(1) and --(2)
49x - 57y = 172
57x - 49y = 252
—————————
106x - 106y = 424
=> x - y = 4--------(3)
now,
subtract from-(1) AND--(2)
49x - 57y = 172
57x - 49y = 252
(-)___(+)____(-)
——————————
-8x - 8y = -80
=> x + y = 10--------(4)
from--(3) and ---(5)
x - y = 4
x + y = 10
—————
2x = 14
=> x = 7 put in --(3)
we get,
7 - y = 4
=> y = 7 - 4
=>y = 3
57x - 49y = 252-----------(2)
adding--(1) and --(2)
49x - 57y = 172
57x - 49y = 252
—————————
106x - 106y = 424
=> x - y = 4--------(3)
now,
subtract from-(1) AND--(2)
49x - 57y = 172
57x - 49y = 252
(-)___(+)____(-)
——————————
-8x - 8y = -80
=> x + y = 10--------(4)
from--(3) and ---(5)
x - y = 4
x + y = 10
—————
2x = 14
=> x = 7 put in --(3)
we get,
7 - y = 4
=> y = 7 - 4
=>y = 3
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