Can someone plz help me with me with these questions

1) answer: 7, heres how to set up the equation 50-4x=x+15
2) answer: 9, 3x+22=7x-14
3) answer: 12, 2x-10=x+2
4) sorry, in a hurry no time to answer this one
5) answer: 7, 2(x+14)=8x-14