FINDING A NUMBER. EQUATION PROBLEM: Finding a number. FIRST-DEGREE EQUATIONS.
We will explain step by step, in a very easy and simple way, how to solve problems where we need to find a number from a given problem statement. To do this, we will need to set up an equation and solve it step by step.
IMPORTANT:
To set up the equation, carefully read the problem statement and write the given information using algebraic notation.
To solve the equation, we will need to follow the rules of transposing terms in order to isolate the unknown or variable and determine its value.
We can assign any letter or symbol to the variable, with x being the most common.
Exercises from the video:
1. Find a number such that twice the number plus seven equals 45.
2. Find a number such that three times the number plus ten equals 37.
3. Find a number such that half the number plus nine equals 51.