5x+2=22 and 2x-1=7 solve these equations and show work

5x+2=22
You would have to subtract 2 from both sides of the equation. Since it is addition, you do the opposite and subtract 2 from 2 and get 0, and 2 from 22 and get 20. Then you are left with 5x= 20
To get just x equals a number, you have to divide the coefficient from the variable. You divide 5 from 5x and get x, and 5 from 20 and get 4. Your final answer should be x=4.
2x-1=7
First you have to do the opposite of the equation. You have to add 1 on to each side. Add 1 on to -1 and you are left with 0. (You count the minus 1 as negative 1) You add 1 on to 7 and get 8. Then you are left with 2x=8. You have to divide the coefficient from the variable. You divide 2 from 2x and get x, and 2 from 8 and get 4. The final answer you should get is x=4

Polar coordinates is 8,9