exam Maths Puzzle Numerical Ability

I would like to know how to solve:

Find the function of (s) when function(-14)=-6s-22

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exam Other Question

x f(x)
0 a
1 24
2 b
if table above shows some values for functon f.
If f is a linear function, what is the value of a+b?
1. 7x/x+6 + 3/x-6

2. 4x+4/5=2x/7-4

3. 2/2r*2-3rs-2s*2 - 5/6r*2-13rs+2s*2 - 8/12r*2+4rs+s*2