12-03-2021
Mathematics

contestada

Solve each system of equations by substitution
x + 4y = 19
x - 2y = 1

What is the product of x and y ?

Solve each system of equations by substitution x 4y 19 x 2y 1 What is the product of x and y class=

Respuesta :

helpy56 helpy56

12-03-2021

Answer:

[tex]x=7\\y=3[/tex]

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grecia07 grecia07

12-03-2021

x + 4y = 19
x = 19 - 4y

*substitute it for the second equation*
x - 2y = 1
19 - 4y - 2y = 1
19 - 6y = 1
-6y = -18
y = 3

x + 4y = 19
x + 12 = 19
x = 7

x.y = 3.7 = 21

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