Can someone me answer this question, i know it seems a little bit basic but i still need some

Twice the sum of a number and 4 is equal to three times the difference of the number and 7. find the number.

Solve this and show you’re work step by step ! -5 3/4+3h< 9 1/4 -

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?