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(75-b+5×6)-(63-5×8)=5×10+40÷8) VA ROG FRUMOS!!!

Răspuns :

( 75 - b + 30) - ( 63 - 40) = 50 + 5
( 75 - b +30 ) - 23 = 55
75 - b + 30 = 55+23
75-b +30 =78
75 - b = 78-30
75-b= 48
b= 75-48
b=27