melodyalexd0 melodyalexd0

28-06-2021
Mathematics

contestada

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

a) 2, - 1
b)2 , 1
c)1 , 2
d)- 2 , - 1

Respuesta :

reinhard10158 reinhard10158

28-06-2021

Answer:

a) 2, -1

Step-by-step explanation:

3x + 2y = 4

2y = 4 - 3x

y = 2 - 3x/2

2x - 3y = 7

2x - 3×(2 - 3x/2) = 7

2x - 6 + 9x/2 = 7

4x/2 + 9x/2 = 13

13x/2 = 13

13x = 26

x = 2

3×2 + 2y = 4

6 + 2y = 4

3 + y = 2

y = -1

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