I dont know the answers to this question please tell me the x and y

Mathematics

1 answer:

Eddi Din [679]2 years ago

3 0

Answer:

x = -5
y = 5

Step-by-step explanation:

=> -7x - 2y = 25

-4x - 9y = -25

=> 4(-7x - 2y = 25)

7(-4x - 9y = -25)

=> -28x - 8y = 100

-28x - 63y = -175

=> 55y = 275
=> y = 5

Now, let's substitute the value of y into the first equation.

=> -7x - 2y = 25
=> -7x - 2(5) = 25
=> -7x - 10 = 25
=> -7x = 35
=> x = -5

Now, let's check our answer to make sure our answer is correct.

Check:

-4x - 9y = -25
=> -4(-5) - 9(5) = -25
=> 20 - 45 = -25
=> -25 = -25

Hence, this is proved correct.

Hoped this helped.

$BrainiacUser1357$

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