Can some one help me please What is the difference of the values of the two variables in this system of equations?

y = 2x + 1
x + 3y = 10
A. 0
B. 1
C. 2
D. 3

Ithink the answer is a

Here for a good time of free question

Answercounterclockwise rotation about the origin by 180 degrees followed by reflection about the y-axisexplanationthe given figure has verticesrecall that for counterclockwise rotation about the origin, when we rotate figure pqrs counterclockwise through an angle of 180° about the origin, the coordinates will becomenext, we reflect in the y-axis by negating the x-coordinates of the resulting figure to obtain,therefore the correct answer is c