How do you tell if the linear equation is one solution many solution or no solution

If it's a graph: Solutions are points of intersection

The same line means infinitely many solutions

Parallel lines = never intersects = no solution

1 point of intersection = 1 solution

If it's a system of equations:

If you get _*x = _(a number), 1 solution (divide by the coefficient, and get only 1 possible value)

If you get x = x, infinitely many solutions (x can be anything and still equal itself)

If you get two different constants equaling (such as 1 = 2), there is no solution because no value of x can make those two values equal.

A) to find total length, we need to simply add the two sides we know together. (this is the total length of the two sides.b) to find the length of the third side, like you said, subtract the length of the two sides from the perimeter of the triangle.