Asked by Sierra Elizabeth

What is the solution? use elimination .
4x-y=23
7x-y=21

a.(11,0)
b.(4,-7)
c.(11,44)
d.(4,7)
Answered by Sierra Elizabeth
is it c?
Answered by Damon
4x-y=23
7x-y=21
------------subtract to eliminate y
-3x =2
x = -2/3 I suspect that you have a typo
Answered by Sierra Elizabeth
its 7x+y= 21? sorry typo?
Answered by Sierra Elizabeth
@damon help
Answered by Damon
4x-y=23
7x+y=21
------------so add instead to eliminate y
11 x = 44

x = 4 well that is better

7(4) + y = 21
28 + y = 21

y = -7
Answered by Sierra Elizabeth
@damon so the answer is c?