4x+ 3y = 23 and 3x + 4y = 5 then the value of xy is
c) 4
7) 23
B) 5
D) 3
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Answer:
c) 4
Step-by-step explanation:
4x+3y=23
3x+4y=5
——————
7x+7y=28 divide by 7
x+y=4
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