1.

Solve312x+138y=202. 138x+312y=173 ​

Answer»

Step-by-step explanation:

312 x + 138 y = 202 = 138 x + 312 y = 173

312x - 138x + 138 y - 312y = 202 - 173

174 x - 174 y = 29

174 ( x - y ) = 29

174 ÷ 29 = x + y

6 = x + y ans.



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