Question

resolva os seguintes sistemas,aplicando a regra de cramer

4x+y=5
x-2y=1

Answer 1

4x+y=5  ------ y=5-4x
x-2y=1 -------- x-2.(5-4x)=1 ------ x-10+8x=1 ----- 9x=11 --- x=11/9
y= 5-4.11/9 ----- 5-44/9 ---- y=1/9