3x-y = 243,3x+y = 729 then y is
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Answer:
3x-y = 243,3x+y = 729 then y is 243
Step-by-step explanation:
3x-y = 243----------(1)
3x+y = 729----------(2)
_________;(1)-(2)
-2y = -486
-y = -486/2
-y = -243
y = 243
3x-y = 243,3x+y = 729 then y is 243
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