Question

Rezolvati urmatoarele problemele:
d) Daca xy-xz =625 si x = 5, calculați y-z;
e) Daca mn+mp = 450 si n + p =10, calculati m;
f) Daca nm - pm = 320 si n - p = 16, calculati m.

Answer 1

d) dai x factor comun:
x×(y-z)=625
5×(y-z)=625
y-z=625:5
y-z=125

e) dai m factor comu:
m×(n+p)=450
m×10=450
m=450:10
m=45

f) dai m factor comun:
m×(n-p)=320
m×16=320
m=320:16
m=20