Help me please, this is algebra 2 and we're dealing with exponential growth and decay

Restrictions on f(x) = 1/x+5 and g(x) = x-2

Sundar used linear combination to solve the system of equations shown. he did so by multiplying the first equation by 5 and the second equation by another number to eliminate the y-terms. what number did sundar multiply the second equation by? 2x+9y=41 3x+5y=36

Find the value of x for which line a is parallel to line b