Can someone help me with number 12 ASAP please

Which is the most efficient first step to solve x in the equation 3.7x - 18 = -4.3x -34 a. add 3.7x to both sides of the equation. b. add 4.3x to both sides of the equation. c. subtract 18 from both sides of the equation. d. subtract 34 from both sides of the equation.

Given that ot =5, xt=12, and ox= 13 is xy tangent to circle o at t? explain.

You give a $4 tip for a meal that cost $22. approximately what percent of the bill was your tip?