<PRE><B>Question 376148</B>
6x+3y=-3, -5x+y=20
add 5 to both ends of 2nd equation
-5x+5x+y=20+5x
y = 20+5x
substitute y in the first equation
6x+3(20+5x)=-3
6x+60+15x=-3
21x=-63
divide by 21
x= -63/21
x= -3
plug value of x into the second equation
-5(-3)+y=20
15+y=20
y=5
CHECK.... 6*-3+3*5= -3 (remember pemdas so it looks like -18+15=-3)
......... -5*-3+5=20    (15+5=20)
ANSWER x=-3 Y=5</PRE>