Question

Dintr-un nr.scad un sfert si inca 6 si raman cu 12.care este nr?

Answer 1

a-a:4-6=12
a-a:4=12+6 amplificam
4a/4-a/4=72/4
3a=72
a=72:3
a=24

verificare 24-24:4-6=24-6-6=12

Answer 2

[tex]a->numarul ~necunoascut\\ a- \frac{a}{4} -6=12\\ a-\frac{a}{4}=12+6\\ \frac{^4^)a}{1}-\frac{^1^)a}{4}=\frac{^4^)18}{1}~~~|*4\\ 4a-a=72\\ 3a=72\\ a=\frac{72}{3}\\ \bold{a=24} [/tex]