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Afla numarul necunoscut:
a) x+260:2*3+4*52=1000
b) 10* [ 25:(35*25-34*25)+ x]-50=0



Răspuns :

a)x+260:2*3+4*52=1000
x+130*3+4*52=1000
x+390+208=1000
x+390=1000-208
x+390=792
x=792-390
x=402

b)10*[25:(35*25-34*25)+x]-50=0
10*(25:25+x)-50=0
10*1+x-50=0
10+x-50=0
10+x=50+0
10+x=50
x=50-10
x=40