What is the solution? use elimination .
4x-y=23
7x-y=21
a.(11,0)
b.(4,-7)
c.(11,44)
d.(4,7)
6 answers
is it c?
4x-y=23
7x-y=21
------------subtract to eliminate y
-3x =2
x = -2/3 I suspect that you have a typo
7x-y=21
------------subtract to eliminate y
-3x =2
x = -2/3 I suspect that you have a typo
its 7x+y= 21? sorry typo?
@damon help
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
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
@damon so the answer is c?