to eliminate ,y what number is multiplied with the equation 7x-5y=0 and then add to the equation 2x+15y+3=0
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Answer:
3
Step-by-step explanation:
3 must be multiplied with the equation 7x-5y=0
then the equation becomes,
21x - 15y = 0
if this equation is added to the 2nd equation then the resulting equation becomes,
21x - 15y + 2x + 15y + 3 = 0
=> 23x + 3 = 0
in this equation we clearly see that y has been eliminated
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