Answer:
12
Steps:
−3x+5y=2
9x−15y=6
Solve −3x+5y=2 for x
= −3x+5y+−5y=2+−5y
= −3x=−5y+2
= −3x/-3 = (−5y+2) /-3
x = 5/3y + −2/3
Substitute 5/3y + −2/3 for x in 9x−15y=6
=9 (5/3y + −2/3) )−15y=6
= −6 = 6
= −6+6=6+6
= 12
