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Am nevoie URGENT de exercitiul 19. Va rog repede!


Am Nevoie URGENT De Exercitiul 19 Va Rog Repede class=

Răspuns :

a) 80+130+x=360
×+210=360
x=150
b)50+90+4x-10+2x+20+x=360
140+7x-10+20=360|-20
140+7x-10=340|+10
140+7×=350|-140
7x=210|÷7
x=30