Question

Resolva o seguinte sistema
a)x+2y=1
3x-2y=11
b) x-y=1
x+2y=0
c)x-y=5
3x+3y=15
d)3x-2y=1
6x-4y=7​

Answer 1

Resposta:

A) x+2y=1 *x+2y=1

3x-2y=11 3+2y=1

__________ 2y=1-3

4x+0 = 12 y=-1

4x=12 S (3, -1)

x= 12/4= 3

B)x-y=1 ×(-1) * x-y=1

x+2y=0 x- 1/3=1

x=1 + 1/3

-x+y=1 x= 4/3

x+2y=0

______ S (1/3, 4/3)

0+3y=1

y= 1/3

C)3x-2y=1 × (-2)

6x-4y=7

-6x+4y=-2

6x-4y=7

________

0x+0y=5 SI