20-11-2020
Mathematics

contestada

3х + 4y = 15
X - Зy = -8

Respuesta :

pratikpuri pratikpuri

21-11-2020

Answer:

(x,y)=(1,3)

Step-by-step explanation:

3x+4y=15_(i)

x_3y=_8_(ii)

subtracting both equations equation (ii) multiplying by 3

3x+4y=15

3x_9y=_24

13y=39

y=39/3

y=3

putting the value of y in equation (i)

3x+4y=15

3x+4×3=15

3x+12=15

3x=15_12

3x=3

x=3/3

x=1

(x,y)=(1,3)

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