Answer:
4
Step-by-step explanation:The factors of 212 are: 1, 2, 4, 53, 106, 212
The factors of 312 are: 1, 2, 3, 4, 6, 8, 12, 13, 24, 26, 39, 52, 78, 104, 156, 312
That first one is correct there is no solution since they are parallel.
The correct answers for x would be

.
In order to find this, we must first get the equation to equal 0. In order to do that, subtract 1 from each side to get the following.
11

- 4x - 1 = 0
Knowing this we can now use the quadratic equation using a = 11, b = -4 and c = -1. The quadratic equation is below.

Now we can plug the values into the equation to solve.

Then simplify using the order of operations.

.
I have completed the 1st one and have attached it.
I don’t even know :( sorry