For the first one the answer is C; if you combine like terms (all the numbers with an x together, and all the numbers without the c together), separately on each side of the equal sign, it simplifies to 5x-5=5+5x. When you subtract 5x from both sides, you get a result of -5=5 which is not true. Therefore, the equation has no solution.
The answer to the second one is -4
The equation is in the form y=mx+b. In the equation, the “b” is the y intercept, and in this case, the “b” in the equation is -4.