James spends 40 years teaching.  His partner has been teaching for 10 years less.  How long is their combined experience?
Ҷеймс 40 сол таълим медиҳад. Ҳамкори ӯ 10 сол камтар таълим медиҳад. Муддати умумии таҷрибаи онҳо чанд аст?
How long has his partner been teaching? ** His partner has been teaching for 40-10=<<40-10=30>>30 years
How long is their combined experience? ** So together they have 40+30=<<40+30=70>>70 years of experience
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How long has his partner been teaching? ** Ҳамкори ӯ 40-10=<<40-10=30>>30 сол таълим медиҳад  
How long is their combined experience? ** Пас, бо ҳам 40+30=<<40+30=70>>70 сол таҷриба доранд  
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