X=y+6
x+6y=20
solving systems of equations using substitution

Iam trying to solve a linear equation for the shoe size of someone 84" tall taking into consideration example 1 is 69" tall with a shoe size of 9 and example 2 is 72 inches tall with a shoe size of 11. i understand that the equation should be y=mx+b and that on the graph the answer is (3,2) but i just don't understand how to create the equation to solve for 84-inches and 60-inches tall questions. after two days, i need .

45 was divided by a power of ten to get 4.5. what power of ten was it divided by? people 4.5

(x-5)1/2+5=2 what is a possible solution?