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a fost răspuns

determinați nr nat x care verifica egalitatile [(x+720:8)×5+700]÷300=4

Răspuns :

[(x+720:8)×5+700]÷300=4⇒[(x+90)×5+700]=1200⇒5x+450=500⇒5x=50⇒x=50:5⇒x=10
x+720/8] *5+700=1200
x+90]*5=500
x+90=500/5
x+90=100
x=100-90
x=10
* inseamna inmultit
/ inseamna impartit

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