Question

2x +y =1
3x-4y=29
Alguém responde pfv?

Answer 1

2x+y=1 >>> y=1-2x >>>>> y=1-2(3)>>y= 1-6>>y=-5
3x-4y=29 >>>> 3x-4(1-2x)=29
3x-4+8x=29
3x+8x=29+4
11x=33
x=3


x=3 e y=-5