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Solve312x+138y=202. 138x+312y=173 |
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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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