Solving systems by substitution
y=x+2 y=2x-5

So first I recommend you line it up like this:
y=x+2
y=2x-5
So, you can plug in y (probably the one that equals x+2) and the equation turns into:
x+2=2x-5
You subtract x from both sides and get:
2=x-5
then, you add 5 to both sides:
x=7
And that is what x equals. 

Syllable added to a root word to change its meaning : affixan independent word--example run,walk,book : free morphemeaffix that gives grammatical meaning such as tense or number : inflectiona word part that must attach to a word in order to be usable : bound morphemedegree of comparison formed by adding -er or more to an adjective : comparativedegree of comparison formed by adding -est or most to an adjective : superlativeaffix added to the beginning of a word : prefixaffix added to the end of a word : suffixroot word of lovable : lovetwo roots used together to form one word : combining form