solve by elimination method : 7x-3y=31,9x+-5y=41
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The given equations are. 7x - 3y = 31 ...(i) 9x - 5y = 41 ....(ii) Now, consider equation. 7x - 3y = 31. ⇒ 7x = 31 + 3y. ...
⇒ 279 + 27 y 7 - 5 y = 41.
⇒ 279 + 27 y - 35 y 7 = 41. ⇒ 279 - 8y = 287. ⇒ -8y = 8. ⇒ y = -1. Putting the value of y in eqn. ( iii). ...
=
= = 4. Thus, the solution
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Answered by
2
Answer:
The given equations are. 7x - 3y = 31 ...(i) 9x - 5y = 41 ....(ii) Now, consider equation. 7x - 3y = 31. ⇒ 7x = 31 + 3y. ...
⇒ 279 + 27 y 7 - 5 y = 41.
⇒ 279 + 27 y - 35 y 7 = 41. ⇒ 279 - 8y = 287. ⇒ -8y = 8. ⇒ y = -1. Putting the value of y in eqn. ( iii). ...
=
= = 4. Thus, the solution set is (4, -1).
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