exam Maths Puzzle Numerical Ability

Solve: 2^(x+1)*8^(-x) =4

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exam Other Question
how mant times greater is 5/6 of 30 than 1/6 0f 30

I think it is 4 as 1/6 of 30 is 5 so 5/6 would be 25, I am just unsure

i think this is the answer as 6/6 would be a whole

Alex We have to graph each linear equation on a graph. I am having trouble with three. The problems are

x= -1
y= 0
y+7= 0

Could you please help me with this?