Find the measurement of the exterior 1

If 1 is divided by the sum of y& 4.the result is equal to 3 divided by 4, find the value of m

How do you solving the solution of each system using elimination?

1- what do you think the product of a nonzero rational number and an irrational number is? is it rational or irrational? make use of variables, the closure property of integers, and possibly a proof by contradiction to prove your hypothesis.2- why do we have to specify that the rational number must be nonzero when we determine what the product of a nonzero rational number and an irrational number is? if the rational number were 0, would it give us the same result we found in the first question?