10 / 11x = (152-x) - 5, how to solve this

10 / 11x = (152-x) - 5, how to solve this

Transfer, 10 / 11x + x = 147, 21 / 11x = 147, x = 77

First observe the following formulas, (x + 5) (x + 6) = x & sup2; + 11x + 30 (X-5) (X-6) = x & sup2; - 11x + 30
Look at the following first,
（x+5）（x+6）=x²+11x+30
（x-5）（x-6）=x²-11x+30
（x-5）（x+6）=x²+x-30
（x+5）（x-6）=x²-x-30
(1) What is the relationship between the coefficient of the first term and the constant term in the product and the constant term in the two factors?
(2) Express the law of the above forms with formulas
(3) Try your formula and write the results of the following two formulas directly
①（a+99）(a-100)=_____________
②（y-14）（y-16）=___________

1) What is the relationship between the coefficient of the first term and the constant term in the product formula and the constant term in the two factors? The coefficient of the first term = the algebra of the constant term in the two factors and the constant term = the product of the constant term in the two factors