Answer:
x= -7
y=0
Step-by-step explanation:
you want to get one variable alone and substitute it into the other equation
in this case, get the y in -5x+y=35 alone
y=5x+35
now substitute this into 3x+2y= -21
3x+2(5x+35)= -21
3x+10x+70= -21
13x=-91
x= -7
now substitute x into one of the equations
3(-7)+2y= -21
-21+2y= -21
2y=0
y=0
