Question

Resolva os sistemas

A) {2× + 2y = 6
{3× - Y = 1

Answer 1

{2x + 2y =6  (1)
{ 3x - Y = 1  (2)
 
{2x + 2y = 6
{6x - 2y = 2   PS: calcela o 2y
8x = 8
x= 1

2x + 2y = 6
2 x 1 - 2y = 6
2 - 2y = 6
2y = 6 -2
2y = 4
y = 4/2
y = 2

s={ (1, 2) }