Question

how do I start this problem ​

Answer 1

Combine multiplied terms into a single fraction

Multiply the numbers

Subtract  7  from both sides of the equation  

Simplify  

Multiply all terms by the same value to eliminate fraction denominators

Answer 2

determine the range and then simplify using cross multiplication so u have 18(7-2n)=7+2n

18(7-2n) = 126-36n=7+2n
move the constant and variable -36n-2n=7-126 collect like terms to where the problem is now -38n=-119
divide both sides by -38 and now you have n= 119/38