Algebra Practice Online Tutoring - Maths Tutors Online

Algebra Practice Online Tutoring - Maths Tutors Online We know algebra is a branch of mathematics that uses mathematical statement to describe relationships between things that vary over time. We know the mathematical statement can describe relationships; those are algebraic terms, expressions or equations. We know basic unit of an algebraic expression is a term. Here, we know the term is a number or product of numbers. For example, 3ax is a term In this variable = x Coefficient of variable = 3a Example 1: Solve for x and y, 2x + y = 3 and x 3y = 12. Solution: From the linear equations 2x + y = 3 and x 3y = 12 From the first equation, we can write y = 3 2x We can substitute this y in the second equation x 3y = 12 x 3 (3 2x) = 12 x 9 + 6x = 12 7x 9 = 12 Now we can add + 9 on both sides 7x 9 + 9 = 12 + 9 7x = 21 Divide by 7, and then we have x = 3 Now we can plug this value in y = 3 2x = 3 2 (3) = 3 6 = - 3. In the next example, it says; If 4 (3x + 2) (x + 5) = - 3 Solution: The given equation is 4 (3x + 2) (x + 5) = - 3 12x + 8 x 5 = - 3 11 x = - 6 x = -6/11