Compléter Algebra VocabularyVersion en ligne Review of terms. par Sylvia Lowell 1 inverse isolate equation expression A math phrase with symbols , numbers and variables without an = sign is called an . A math phrase that has symbols , numbers , and variables with an = sign is called an . When you solve equations to find the value of the variable you have to the variable to get it alone on one side of the = sign . In order to isolate the variable , you have to use the operation , and do the same operation on both sides of the equation .