here's a more ground-level solution for statement (2).
notice that there's a '2x' in the inequality given in the question prompt, and another '2x' in statement 2. this is a fine opportunity for substitution.
so, SOLVE both things for the '2x':
divide the inequality by -1 --> 2x < -3y
isolate the '2x' in statement (2) --> 2x = -5y + 20
substitute --> -5y + 20 < -3y
solve --> 20 < 2y
10 < y
y > 10
which means
-2x > 3y > 30
-2x > 30
x < -15
sufficient
--
you can theoretically use plug-in-numbers on this problem, but it's much more trouble than is worthwhile.
Ron has been teaching various standardized tests for 20 years.
--
Pueden hacerle preguntas a Ron en castellano
Potete chiedere domande a Ron in italiano
On peut poser des questions à Ron en français
Voit esittää kysymyksiä Ron:lle myös suomeksi
--
Quand on se sent bien dans un vêtement, tout peut arriver. Un bon vêtement, c'est un passeport pour le bonheur.
Yves Saint-Laurent
--
Learn more about ron
