Algebra 1 Review

Algebra 1 Review Algebra is a branch of Mathematics in which symbols, usually letters of the English alphabet are written along with the numbers to represent an arithmetic expression or equation depicting a relation. Algebra 1- Review provides a very effective tool in solving mathematical problems by representing unknown quantities in the form of a symbol or letter of the English alphabet(x, y, z etc.). There can be one or more unknowns in an equation, but each unknown is represented by a different letter. An algebraic expression has a collection of numbers and letters separated by the +, -, x or operators. If the highest exponent on the variable in the algebraic equation is 1 it is said to be linear equation. Example: Solve 4x + 7 = 11 Solution: - Equation is:- 4x + 7 = 11 In this equation now to find the value of x, first we have to subtract 7 from both sides, So, 4x + 7- 7 = 11- 7 4x + 0 = 4 4x = 4 Now in the last step to find the value of x, we have to divide both sides of the equation by 4 Therefore, 4x/4 = 4/4 x = 1 So x =1 is the solution of the above equation. Example 2:- Solve 2x + 5 = 25 Solution 2:- Equation is 2x + 5 = 25 Similarly in the above equation we need to subtract 5 from both sides of the equation and then we have to divide by 2. 2x + 5 = 25 2x + 5- 5 = 25-5 2x = 20 x = 10. So x =10 is the solution of the above equation.