I-mathematical equation yintetho enee-variables, nokokuba inye ubuncinane, (Uyawukhumbula ke okokuba xa kuthethwa nge-variable kuthethwa ngexabiso elingaziwayo) (=unknown value) kunye nophawu olubonisa isiphumo saloo nto ibaliweyo (uphawu lwe-""equals sign"" ( = ) oluhamba nentetho yakwamathematika kicala ngalinye. Uphawu olubonisa isiphumo (=) luthi omabini amacala anexabiso alifana ncam, okanye ayinto enye ngokwexabiso. I-equation ingasuka ibe yinto elula enje: x=0, okanye ibe yinto enzima enje: 4(3y^99)+76=42÷3x okanye ibenzima nagaphezulu koku.