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Afla numarul necunoscut matematica (c+15):5=64:8
si dupa afla numarul necunoscut matematica 30x6-16:2-b=19


Răspuns :

(c+15):5=8 /*5
c+15=40 /-15
c=25

30*6-16:2-b=19
180-8-b=19
172-b=19 
b= 172-19
b=153
(c+15):5=64:8
(c+15):5=8
c+15=8×5
c+15=40
c=40-15
c=25

30×6-16:2-b=19
180-8-b=19
172-b=19
b=172-19
b=153

please coroana am nevoie
sau daca nu multumesc