350. 3x+5y=9, 2x+3y=4, find x and y.
(a) x=7, y=6 (b)x= -7, y=6
(c)x= -7, y=-6 (d) x=7, y= -6
Answers
Answered by
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Step-by-step explanation:
option a is the answer
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Answered by
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Step-by-step explanation:
3x+5y=9---------(1)
2x+3y=4----------(2)
(1)×2=6x+10y=18
(2)×3=6x+9y=12
(-) (-) (-)
-----------------------
y=6
putting the value of y in equation (1) we can get
3x+5y=9
=>3x+5×6=9
=>3x+30=9
=>3x=9-30
=>3x= -21
=>x= -21/3
=>x= -7
so x= -7 and y=6(option B)
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