Given a linear equation of two variables x and y, we can express x in terms of y by isolating x to the right side of the equation and y to the left.

　　Example:

　　Given the equation ax+by+c=d,we can express x in terms of y as follows:

　　1.ax=d-by-c,by subtracting by+c from both sides

　　2.x=(d-by-c)/a,by dividing both sides by a.

　　Remember:

　　All linear equations of two variables x and y can be written as ax+by+c=d, and x=(d-by-c)/a.

　　由于美國(guó)數(shù)學(xué)基礎(chǔ)教育的難度增加導(dǎo)致數(shù)學(xué)考試越來(lái)越難，但新gre數(shù)學(xué)復(fù)習(xí)考點(diǎn)都是高中時(shí)候?qū)W到的知識(shí)點(diǎn)，考生不要過(guò)于緊張，把基本概念弄明白，再記住一些新版gre數(shù)學(xué)必備的詞匯，那么相信新版gre數(shù)學(xué)應(yīng)該沒(méi)有問(wèn)題。