Question

Solve the system by subsitution method

Answer 1

Substitute Y = 3X - 6

in second equation

-15X + 5•(3X - 6) = -30

Now solve for X, cancel parenthesis

use a(b+c) = ab + ac

-15X + 15 X - 30 = -30

. -30 = -30

Then we see that, have infinite solutions

In consecuence, ANSWER IS

OPTION D) (x , 3x - 6 )