Question

реши систему 5a-3b=14 2a+b=10

Answer 1

{5a-3b=14 |×2
{2a+b=10 |×5

{10a-6b=28
-
{10a+5b=50
-11b=-22
b=2

5a-3×2=14
5a=14+6
5a=20
a=4