Answer:
x=5/2 − 5y/4 => the first sentence
Step-by-step explanation:
Solve for x in the first equation.
x=5/2−5y/4
12x+15y=30
Replace all occurrences of x
with 5/2−5y/4 in each equation.
30=30
x=5/2−5y/4
Remove any equations from the system that are always true.
x=5/2−5y/4
if y=0 => x=5/2
