Question

Me podrian ayudar porfavor?
Es el ejercicio 5,
hay que resolver aquellas ecuaciones con el metodo de igualación.
Espero que me ayuden,Muchas Gracias.

Answer 1

3x+2y = 7
4x - 3y = 15
x = 7-2y / 3
x = 15+3y /4

7-2y/3 = 15+3y / 4
4(7-2y) = 3(15+3y)
28-8y = 45+9y
28-45 = 17y
y = -17/17 = -1
x = 7+2/3 = 9/3 = 3

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

2y-x = 3
3x+7y = 43
x = -3 + 2y
x = 43-7y/3
-3+2y = 43-7y/3
-9+6y = 43-7y
13y = 43+9
13y = 52
y = 4
8-x = 3
x = 5
================
2x+4y = 6
3x+7y = 5
x = 6-4y/2
x= 5-7y/3
6-4y/2 = 5-7y/3
18-12y = 10-14y
8 = -2y
y = 8/-2 = -4
2x -16 =6
2x = 22
x = 11

================
x+y = 1
3x+2y = -1
x = 1-y
x = -1-2y/3
1-y = -1-2y/3
3-3y = -1-2y
3+1 = y
y = 4
x +4 = 1
x = -3