X-y=-10 2x+4y=22 Solving Systems by Substitution

Mathematics

1 answer:

IRINA_888 [86]3 years ago

8 0

Answer:

[1] x - y = -10

[2] 2x + 4y = 22

Step-by-step explanation:

// Solve equation [1] for the variable x

[1] x = y - 10

// Plug this in for variable x in equation [2]

[2] 2•(y -10) + 4y = 22

[2] 6y = 42

// Solve equation [2] for the variable y

[2] 6y = 42

[2] y = 7

// By now we know this much :

x = y-10

y = 7

// Use the y value to solve for x

x = (7)-10 = -3

I am sorry if I got it wrong but I hope this helped.

MARK ME BRAINLEST.

You might be interested in

Need help on this math problem

erik [133]

Answer:

$-5, 18, \sqrt{13}$

Step-by-step explanation:

We can solve the first equation, f of -3. The value of the function f is $\frac{1+x^2}{x+1}$ , and plugging in -3 gets us $\frac{1+9}{1-3}$ , this results in 10 divided by negative 2, which is negative 5.

Now, we must solve g of negative one third. The function g is defined as $|9x-15|$ . Plugging in negative one third into the question gets us $|9(-\frac{1}{3})-15|$

9 times negative one third is -3, and -3 minus 15 is -18. The absolute value of -18 is 18.

Now, we must solve h of negative 2, and h is defined as $\sqrt{-3-8x}$ . Plugging in negative 2, we have $\sqrt{-3-8(-2)}$ . Negative 8 times negative 2 is positive 16, and 16 minus 3 is 13. The answer is the square root of 13