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How to write a substitution equation

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A way to solve a linear system algebraically is to use the substitution method. The substitution method functions by substituting the one y -value with the other. We're going to explain this by using an example. You can use the substitution method even if both equations of the linear system are in standard form. Just begin by solving one of the equations for one of its variables. Share on Facebook.

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Systems of equations with substitution

To create this article, volunteer authors worked to edit and improve it over time. This article has been viewed 14, times. Learn more When you encounter a function nested within another function, you cannot integrate as you normally would.
Because if we are ever asked to solve problems involving the slope of a tangent line, all we need are the same skills we learned back in algebra for writing equations of lines. All we will do is substitute the given information into the point-slope formula and simplify, as indicated below. This means that to find the equation of a tangent line to a curve, f x , we simply need two elements: point and slope.
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