GRE数学：In Terms of

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　　Equation-In Terms of

　　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=/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=/a.