by elimination method 3x-5y=4,9x=2y+7
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Answered by
10
Step-by-step explanation:
3x - 5y = 4 --->(i)
9x - 2y = 7 --->(ii)
Multiply eqn (i) by 9
9(3x - 5y = 4)
27x - 45y = 36 --->(iii)
Multiply eqn (ii) by 3
3(9x - 2y = 7)
27x - 6y = 21 --->(iv)
From (iii) and (iv)
27x - 45y = 36
27x - 6y = 21
————————
-39y = 15
=> y = -15/39
=> y = -5/13
from eqn (i):
3x - 5y = 4
=> 3x - 5(-5/13) = 4
=> 3x + 25/13 = 4
=> 39x+25/13 = 4 (taking LCM)
=> 39x + 25 = 52
=> 39x = 27
=> x = 27/39
=> x = 9/13
Answered by
4
Step-by-step explanation:
x = 9/13
y = -5/13
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