# Algebra 1 Chapter 3 Vocab

## 15 terms

add the same number to both sides of an equation and get an equivalent equation ex: a+c=b+c

### Identity

an equation that is true for all acceptable replacements

### Multiplication Property of Equality

we can multiply both sides of the equation by the same number ex: a,b, and c, if a = b, then ac = bc

### Percent

the ratio of a number to 100 ex: 78.9%

### Percent Decrease

divide the amount of increase by the original amount

### Percent Increase

divide the amount of decrease by the original amount

### Proportion

an equation that states that two ratios is equal ex: 2/3 = 6/9

### Ratio

two quantities is a comparison, often expressed as a fraction ex: the ratio of the age of a 34 year old parent to that of a 10 year old boy is 34 to 10 or 34/10

### Solution

values for subtracted for the variable that make a sentence true "to solve" - find all the solutions

### Solve (to "solve" an equation)

get the variable alone on 1 side of the equation

### Steps to Solve an Equation

1) list data 2) assign a variable to the unknown value 3) solve 4) check answer

Subtraction