exam Maths Puzzle Numerical Ability

Supply equations
P=1/10q + 130
If p = $150
How many units will be produced
I do not know how to do this equation.
Can Someone help me?
Thanks

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exam Other Question
Given f(x)=5x+3 and g(x)=x2-2 find each value

g(5)

5[g(3)] Moly is 3 years younger than Havier. In 3 year, havier will be as twice as molly age.