Excellent Equation Help
     (If you need it, you're at the wrong place!!)
   Go here for help Trisha's Site .

Literal Equations
a.k.a. Solving letters!!!!!!

E=IR solve for R	It's just simple algebra.
E=IR I    I	Divide both sides by I to leave R by itself.
E=R I	R equals E divided by I.

Now Comes..... Linear Equations!!!!!
Finding a Number.

2x-4x=-5	Just as easy as the first.
-2x=-5	Combine like terms.
-2x=-5 -2    -2	Divide both sides by -2 to leave your x alone.
x=5/2	Simple.

Finally
The 3 Equations for a Line
(when given 2 points)

Find the equations of a line that passes through (2,-3) and (5,-5)	Problem
-5-(-3)= -2   5-2          3	Find the slope.
-3=(-2/3)2+b -3=-4/3+b -5/3=b	Plug in 1 set of points and the slope. Multiply the slope and x. Subtract the product from your y to find b.
y=mx+b	Equation for a line (you knew that right?)
y=-2/3x-(5/3)	Answer in Slope Intercept Form
y-y1=m(x-x1)	Point Slope Form
y-(-5)=-2/3(x-5)	Plug in to get your answer.
ax+by=c	Standard Form Equation
y=-2/3x-(5/3) (3)y=(3)-2/3x-(5/3)(3) 3y=-2x-5	Start with your slope intercept equation. Multiply to get rid of your denominators. Add 2x to the other side to leave the y-intercept(c) by itself.
2x+3y=-5	Answer in Standard Form.

 
 

Now we're done!!!!
 

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