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tatuchka [14]
3 years ago
14

7x-4y=-75x+y=22how do I solve this using substitution?

Mathematics
1 answer:
DaniilM [7]3 years ago
5 0
<span>A) 7x-4y=-7
B) 5x+y=22
We can rearrange equation B)
B) y = 22 -5x Then we can substitute it into equation A
A) 7x -4*</span><span>(22 -5x) = -7
A) 7x -88 +20x = -7
</span><span>A) 7x +20x = 81
A) 27x = 81
x = 3
</span>5*3 + y = 22
y = 7


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