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sergejj [24]
3 years ago
13

How do you solve the system of the linear equation by substitution? y=x-4 4x-y=3

Mathematics
2 answers:
Rama09 [41]3 years ago
4 0

Answer: (-\frac{1}{3},-\frac{13}{3}

Step-by-step explanation:

Substitut (x-4) into the equation of 4x-y=3

(Substitute what y equals into the equation

Make sure to keep parentheses!

That becomes 4x-(x-4)=3

Than you must distribute the negative to x and to -4

When you do it creates the equation of 4x-x+4=3

When combining like terms you get: <u>3x+4=3</u>

Then solve                                                -4   -4

<u>3x=-1</u>

3    3               x=<u>-1  </u>  

                           3

Than substitute the x in for the equation of y=x-4 to find what y equals! since you know that x equals -1/3 than subtract -1/3 - 4 to get

y= <u>-13        </u>  

     3        

Bingel [31]3 years ago
3 0

Answer:

x=-1/3, y=-13/3. (-1/3, -13/3).

Step-by-step explanation:

y=x-4

4x-y=3

------------

4x-(x-4)=3

4x-x+4=3

3x+4=3

3x=3-4

3x=-1

x=-1/3

y=-1/3-4

y=-1/3-12/3=-13/3

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