Chapter 7 - Equations

if you divide each side of an equation by the same nonzero number, the two sides remain equal

the value of a variable that makes an equation true. Ex. 12 = x + 7, x is 5

a symbol of equality

operations which undo each other. Ex. (+ and -) (x and ÷)

a mathematical sentence showing two expressions are equal. Should contain an equals sign.

to replace a variable with a value that results in a true sentence (TO FIND THE ANSWER)

if you add the same number to each side of an equation, the two sides remain equal

if you multiply each side of an equation by the same nonzero number, the two sides remain equal

if you subtract the same number from each side of an equation, the two sides remain equal