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Determinați numărul X: a)(100 - X :76)*35 + 1=876 b)[(100+x): 75 - 1)]*35=875

Răspuns :

(100 - x :76)*35 + 1=876

(100-x:76)×35=876-1

(100-x:76)×35=875

100-x:76=875:35

100-x:76=25

x:76=100-25

x:76=75

x=76×75

x=5700

[(100+x): 75 - 1)]*35=875

(100+x):75-1=875:35

(100+x):75-1=25

(100+x):75=25+1

(100+x):75=26

100+x=26×75

100+x=1950

x=1950-100

x=1850