Question

A) {4x-3y = 0 {x-3y=-9
B) {2x+ 14y = 34 {x+7y=17
C) {3x-2y = -2 { 3x-2y=12
D) {2x+8y= -2 {3x-2y=-5

Answer 1

Bom dia

A)

{4x - 3y = 0
{x - 3y = -9
x - 4x = -9
-3x = -9
x = 3

3y = 12
y = 4

B)

{2x+ 14y = 34
{x + 7y = 17

2x + 14y = 34
2x + 14y = 34
sistema SPI


C)

{3x-2y = -2
{3x-2y =12
sistema impossível SI

D)

{2x + 8y = -2
{3x - 2y = -5

x + 4y = -1
6x - 4y = -10
7x = -11
x = -11/7
-11/7 + 4y = -7/7
4y = 11/7 - 7/7
4y = 4/7
y = 1/7