# How do you simplify 18m-7+12m?

Jan 8, 2016

by collecting like terms.

#### Explanation:

like terms are terms which have the same variable in them then you collect them by adding / subtracting their coefficients.

18m and 12m are like terms , - 7 is on it's own

18m + 12m = 30m

hence 18m - 7 + 12m = 30m -7