Can someone please help​

Can someone check if i did this right since i really want to make sure it’s correct. if you do you so much

One number is 4 less than 3 times a second number. if 3 more than two times the first number is decreased by 2 times the second number, the result is 11. use the substitution method. what is the first number?

The functions f(x) and g(x) are shown in the graph f(x)=x^2 what is g(x) ?