In order for x to be alone first you have to add 4 to both sides(which would cancel out -4) making it 2x=22 now you have to divide 2 from both sides making it x=11 so for the operations used I am sure it’s addition and division. Hope that helped!
So you need to find 15% of $27.38. To do this you can multiply 27.38 * .15 and get 4.107. Round to $4.11 and this is the tip. The total bill would be $31.49
