Footnote
a Kwialgebra yangoku, kudla ngokusetyenziswa u-x okanye u-y kwindawo yamanani angaziwayo. Masizekelise ngesi sibalo: x + 4 = 6. Xa sithabatha u-4 ku-6 kuphuma u-2, nto leyo ethetha ukuba u-x = 2.
a Kwialgebra yangoku, kudla ngokusetyenziswa u-x okanye u-y kwindawo yamanani angaziwayo. Masizekelise ngesi sibalo: x + 4 = 6. Xa sithabatha u-4 ku-6 kuphuma u-2, nto leyo ethetha ukuba u-x = 2.