Simple Equation And Subject of formula

SIMPLE EQUATION: is any algebraic equation with one unknown.

EXAMPLE

Solve for p in the equation p – 7 = 24

SOLUTION

.IF P – 7 = 24, then add 7 to both sides of the equation

P -7 +7 = 24 + 7

P = 31

EXAMPLE 2:

Solve the equation 5(c +2) – 3(3c -5) = 1

Solution

5c+10-9c+15 =1. First open the bracket, collect like terms and simplify.

5c-9c+10+15 = 1

-4c+25 = 1, subtract 25 from both sides of the equation

-4c = 1-25,

-4c = -24, divide -4 by both sides

C = 6.

CHANGE OF SUBJECT OF FORMULAE

A formula is an equation consisting of letters which represent quantities.

EXAMPLE

Make each of the following letters giving the subject of formula: