👤

Determinati numarul natural x:
56-2x[37-(x-15)]=12
4x[123-5x(27-x)]-14=78


Răspuns :

56-2*[37-(x-15)]=12
2*[37-(x-15)]=56-12
2*[37-(x-15)]=44
37-(x-15)=44:2
37-(x-15)=22
x-15=37-22
x-15=15
x=15+15
x=30

4*[123-5*(27-x)]-14=78
4*[123-5*(27-x)]=78+14
4*[123-5*(27-x)]=92
123-5*(27-x/=92:4
123-5*(27-x)=23
5*(27-x)=123-23
5*(27-x)=100
27-x=100:5
27-x=20
x=27-20
x=7