i read in book that linear equation have one degree variable and a little further when i go i saw the give example 10/5=2 that this is linear that make me confused that in this example the degree of equation is -1 how it can be linear? 2-my second question is that can rational and radical equation be linear like sqr(y-9)=10 is this linear if yes how we can know that this is linear because the exponent of variable is not 1 so how we can say that this is linear?how we can know that a equation is linear or not ?
thank you
thank you