Vocabulary

What is for a value we don't know yet.

Answer explanation

For example in 4y-7=5

y is the variable.

list of number in a special order

a single number or variable,or numbers and variables multiplied together.

Answer explanation

Terms are separated by + or -symbols. For example, 4y-7 =5,4y ,7 and 5 are terms

A number used to multiply a variable(written in front).

Answer explanation

it is written in front.For example in 4y-7=5,4 is the coefficient for y (the variable)

Terms whose variables and exponents are the same.

Answer explanation

for example 7y and 4y are like terms,8y*z and 2y*z are like term

is multiplying to remove bracket.

Answer explanation

Expanding

Numbers,symbols and operators(such as + and x) grouped together to show the value of some thing.

for example 4y-7

a whole number (no decimals),including zero and negative numbers.

Rewrite an expression putting values where the variables are.For example in 4y -7,we can substitute y=1 so 4x1-7=-3 or we can substitute y=3a so 4x3a-7=12a-7

替换

Finding what to multiply to get an expression