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312x+138y=202. 138x+312y=173
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Answered by
41
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.
Answered by
10
Answer:
6 = x + y is the 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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