Please do 5 = f + b and find the equation for B

Leo has b boxes of pencils. each box contains 6 pencils. he has a total of 42 pencils. the equation that represents this situation the value of b that makes the equation true the first one is b+6=42,6b=42,b=42+6,or 42b=6 the second one are 7,836 48

Does anyone know how to do geometryme with this problem

Solve each quadratic equation by factoring and using the zero product property. 10x + 6 = -2x^2 -2