Answer: C
Explanation:
4x - 12y = -10
-3x + 10y = 10
In order to solve this using substitution method, you will have to
divide one equation by the coefficient of x or y
e.g. divide 4x-12y = -10 by 4 to get x-3y = -5/2
x = 3y-5/2
and substitute x for 3y-5/2 which is pretty complicated.
Not sure what you mean by "readily solved", though.