Question

REGRA DE CRAMER (SISTEMA)
3x-2y=-4
4x+y=9

Answer 1

3x-2y=-4
4x+y=9     

3  -2

4  1

Δ=3+8 =11

-4   -2

9     1

Δx=-4+18=14

x=Δx/Δ=14/11

3    -4

4     9

Δy=27+16=43

y=Δy/Δ=43/11