Question

система уравнений 3x - 2y =5, 11x + 3y = 39

Answer 1

3x-2y=5
11x+3y=39

y=(3x-5)/2

11x+3*(3x-5)/2=39
22x+3(3x-5)=78
22x+9x-15=78
31x=93
x=3

y=(3*3-5)/2
y=2