Bonjour je n'arrive pas à résoudre ce problème quelqu'un pourrait-il m'aider ​

One side of a rectangle is 7 feet shorter than seven times the other side. find the length of the shorter side if we also know that the perimeter of the rectangle is 306 feet.

Which equation expression the relationship between the number of boxes b and the number of cans c and the proportion is 48

In the diagram, gef and hef are congruent. what is the value of x