3x + 2z - 4y - 6 + 4z + 7y x = 2, y = 1, z = -3

plz help me with this. this is a substitution question.

Can someone me and do the problem plz so i can understand it more better

What set does not contain -3 the set of all real numbers the set of all integers the set of all whole numbers the set of all rational numbers

Graph g(x)=2cosx . use 3.14 for π . use the sine tool to graph the function. graph the function by plotting two points. the first point must be on the midline and closest to the origin. the second point must be a maximum or minimum value on the graph closest to the first point.