Answer:
1)
2) 
Step-by-step explanation:
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This question is impossible to solve.
this is why:
if 4x-4=0
then x=1
so if 8x + 4 = 8
then x is false.
I get these question quite a lot in my GCSEs.
you have to prove why they are fake.
Answer: y = 91
Step-by-step explanation:
y = -7(-13)
y = -7 x -13
y = 91
For direct variation, y = kx
8 = -4k
k = 8/-4 = -2
Therefore, required equation is y = -2x
when x = 7, y = -2(7) = -14
Provide a problem and I will explain