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Bess [88]
3 years ago
10

Y=4x and 3x+y=-21. Substitute

Mathematics
1 answer:
gizmo_the_mogwai [7]3 years ago
5 0

value of x= -3 and value of y = -12

Solution set is (-3,-12)

Step-by-step explanation:

We need to solve the system of equations using substitution

The system of equations are:

y=4x\\3x+y=-21

Solving:

Let

y=4x\,\,eq(1)\\3x+y=-21\,\,eq(2)

Solving:

Putting value of y from equation 1 into equation 2

3x+y=-21\\3x+4x=-21\\7x=-21\\x=-21/7\\x=-3

So, value of x = -3

Now, putting value of x into equation 1 and find value of y

y=4x\\y=4(-3)\\y=-12

Value of y = -12

So, value of x= -3 and value of y = -12

Solution set is (-3,-12)

Keywords: System of equations

Learn more about system of equations at:

  • brainly.com/question/9045597
  • brainly.com/question/3739260
  • brainly.com/question/13168205

#learnwithBrainly

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