Question

Determine as soluções dos sistemas:
a) 10x + 2y = 10
10x - 2y = -2
b) 5x - y = 4
-2x + y = 5

Answer 1

Eaew!!!


Vamo lá, rapidiones!


{10x + 2y = 10
{10x - 2y = -2
============
20x = 8
x = 8/20
x = 2/5

10x + 2y = 10
10.2/5 + 2y = 10
20/5 + 2y = 10
4 + 2y = 10
2y = 10 - 4
2y = 6
y = 6/2
y = 3

S={ 2/5, 3 }

=============================

B)

{ 5x - y = 4
{-2x + y = 5
==========
3x = 9
x = 9/3
x = 3

-2x + y = 5
-2.3 + y = 5
-6 + y = 5
y = 5 + 6
y = 11

S={ 3, 11 }



★Espero ter ajudado!! tmj.