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afla numarul necunoscut din expresii (72:3×8+16×8+2×b×2):12=29

Răspuns :

(24*8+128+4b):12=29

(192+128+4b):12=29

(320+4b):12=29

320+4b=12*29

320+4b=348

4b=348-320

4b=28

b=28:4

b=7

Sper că te-am ajutat!

(72:3×8+16×8+2×b×2):12=29

(24×8+128+4×b):12=29

(192+128+4×b):12=29

(320+4×b):12=29

320+4×b=12×29

320+4×b=348

4×b=348-320

4×b=28

b=28 : 4

b=7