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k0ka [10]
3 years ago
7

Can somebody answer this for me?

Mathematics
1 answer:
Sphinxa [80]3 years ago
8 0

XZY.................

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Solve the system of equations.<br> 2y+7x=−5<br> 5y−7x=12<br> ​
3241004551 [841]

We can solve this by substitution method.

Look at the second equation. If we rearrange to find 7x, we can substitute in the value into the first equation.

5y-7x=12

5y-7x-12=0

5y-12=7x

Therefore, 7x=5y-12

Now replace the 7x in the first equation with 5y - 12:

2y+7x=-5 (substitute in 7x = 5y - 12)

2y+(5y-12)=-5

7y-12=-5

7y=7

y=1

Now that we know y, we can find x by substituting in y = 1 into any equation we want. I will use the equation: 7x = 5y - 12

7x=5y-12 (substitute in y = 1)

7x=5(1) -12

5x=5-12

7x=-7

x=-1

__________________________________________________________

<u>Answer:</u>

<u></u>y=1\\x=-1<u></u>

4 0
3 years ago
Can you please help with the answer
sertanlavr [38]

11w times 6x

240w times 18y

you always use the last numbers and that would equal...

____________________________________________________________

66x times 4320y=

285120 divide it by 6= 47520

then by 12

47520 divided by 12=

3960-80= 3880

3880 divided by 16 times 4

your answer is 970y

8 0
3 years ago
BRAINLIEST FOR 1ST AND SECOND WHO ANSWERS.... EMERGENCY
Thepotemich [5.8K]

Answer:

I think it will be $16.50

Step-by-step explanation:

sorry if I'm wrong

8 0
3 years ago
Last week, Robert's Diner sold 19 milkshakes with whipped cream on top and 19 milkshakes without whipped cream. What percentage
bagirrra123 [75]

Answer:

50 percentage

Step-by-step explanation:

19+19=38

he had 19 whipped cream

cuz that's half 38

4 0
3 years ago
Write the following number as an improper fraction:<br> -12 2/3
nalin [4]
12 (3) = 36
36+2= 38
so the answer is -38/3
7 0
3 years ago
Read 2 more answers
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