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n-30×7 = 400+3×20+52 :2

Răspuns :

n-30•7=400+60+26
n-210=486
n=486+210
n=696
n-30×7=400+3×20+52:2
n-210=400+60+26
n-210=460+26
n-210=486
n=486+210
n=696
Sper ca te-am ajutat!