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• Pre-Algebra
• Algebra
• Geometry
• Graphs and functions
• Trigonometry
• Coordinate geometry
• Combinatorics
 Arithmetics Signed numbers Divisibility Fractions Exponents & roots Percentages Proporcional reasoning
 Monomials Polynomials Special products Equations Word problems - equations Quadratic equations Simultaneous equations Word problems- Simultaneous equations Radicals Sequences and series Systems of 3 variables equations Matrices Determinants Inverse of a matrix Inner product
 Pythagorean Theorem 2-D Shapes
 Trigonometric functions of an acute angle Trigonometric functions of related angles Trigonometric identities Solving right triangles Law of sines Law of cosines
 Equations of a straight line Parallel, coincident and intersecting lines Distances Angles in space Inner product
 Factorial Variations without repetition Variations with repetition Permutations without repetition Permutations with repetition Circular permutations Binomial coefficient Combinations without repetition Combinations with repetition Exercises

Linear equation
Solving Linear Equations
An equation is a mathematical statement that has an expression on the left side of the equals sign (=) with the same value as the expression on the right side.

One of the terms in an equation may not be know and needs to be determined. Often this unknown term is represented by a letter such as "x".

(e.g. 5 + x = - 2)

Solving
an equation means manipulating the expressions and finding the value of the unknown variables. In order to solve for the unknown variable, you must isolate the variable

To keep an equation equal, we must do exactly the same thing to each side of the equation. If we add (or subtract) a quantity from one side, we must add (or subtract) that same quantity from the other side.

Solve:

$/fs22x+5=x+8/;/;/Rightarrow/;/;2x-x=8-5/;/;/;/Rightarrow/;/;x=3$

 $3x-4=6x-28$ Solution: