Solve the system by elimination. . 4x-9y=-21 , -4x-3y=9
1 answer:
(-3, 1)
4x-9y=-21
+-4x-3y=9
-12y= -12
y=1
4x- 9(1)= -21
4x-9=-21
+9 +9
4x= -12
x=-3
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