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dusya [7]
3 years ago
10

-4x + y = 6 -5x - y = 21 Solve for both x and y using substitution.

Mathematics
1 answer:
Ivenika [448]3 years ago
4 0
Solve the following system using substitution:
{y - 4 x = 6
{-5 x - y = 21

In the first equation, look to solve for y:
{y - 4 x = 6
{-5 x - y = 21

Add 4 x to both sides:
{y = 4 x + 6
{-5 x - y = 21

Substitute y = 4 x + 6 into the second equation:
{y = 4 x + 6
{-9 x - 6 = 21

In the second equation, look to solve for x:
{y = 4 x + 6
{-9 x - 6 = 21

Add 6 to both sides:
{y = 4 x + 6
{-9 x = 27

Divide both sides by -9:
{y = 4 x + 6
{x = -3

Substitute x = -3 into the first equation:
{y = -6
{x = -3

Collect results in alphabetical order:
Answer: {x = -3, y = -6
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3 years ago
Solve: 2 In 3 = In(x - 4)<br><br><br> a) x=9 <br><br> b) x= 10<br><br> c) x=13
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Answer:

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Read 2 more answers
Can someone help me with this please
Natasha2012 [34]

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Step-by-step explanation:

6 0
2 years ago
Plz answer both if you can
Harlamova29_29 [7]
I hope this helps you



130+x-5+x-35+x+30+75=360


3x=360-195


3x=165


x=55


m (B)=55-5=50
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