Is a divided by 0 defined? explain fully using a related mulitplication problem.

Given the system of equations presented here: 2x + 4y = 14 4x + y = 20 which of the following actions creates an equivalent system such that, when combined with the other equation, one of the variables is eliminated? multiply the second equation by â’4 to get â’16x â’ 4y = â’80 multiply the second equation by â’1 to get â’4x â’ y = â’20 multiply the first equation by 2 to get 4x + 8y = 28 multiply the first equation by â’1 to get â’2x â’ 4y = â’14

Present age of man is 45 years, 5 years back his age was 4 times age of his son what is present age of his son?

Can someone me with my math problem pls my teacher is on my back about this