Help please & thanks!

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.

Which ahows the graph of the solution set of 6x+4y< 12

Find the value of x for which abcd must be a parallelogram -9-6x x-30