Respuesta :

unicorn3125

​ ​​ ​-7x - 6y = 4      and      x = -3y + 8 ​​

so:

    -7(-3y+8) - 6y = 4

    21y - 56 - 6y = 4

        15y = 4 + 56

        15y = 60

          y = 4    

x = -3y + 8

x = -3•4 + 8

x = -12 + 8

x = -4

The value of x and y are -4 and 4 respectively.

Expression

In mathematics, an expression is defined as a set of numbers and mathematical operations that is formed according to rules which is dependent on the context.  

Given to us,​​

  • ​equation 1, −7x−6y=4
  • ​equation 2, x=−3y+8

For the value of y

From ​equation 2, we get the value of x, substitute the value of x in ​equation 1,

[tex]-7(-3y+8)-6y=4\\21y -56-6y = 4\\21y-6y=4 +56\\15y = 60\\\\y= \dfrac{60}{15}\\\\y = 4[/tex]

For the value of x

Substitute the value of y in ​equation 2,

[tex]x=-3y+8\\x= -3(4)+8\\x = -12+8\\x = -4[/tex]

Hence, the value of x and y are -4 and 4 respectively.

Learn more about Expression:  

https://brainly.com/question/13947055

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