3 years ago

5x + 6y = 20 , 8x - 6y = -46

Mathematics

1 answer:

serg [7]3 years ago

7 0

Answer:

5x + 6y = 20_____(1)

8x - 6y = -46_____(2)

Solving simultaneously:

Eqn(1) + Eqn(2)

5x + 8x + 6y + (-6y) = 20 + (-46)

13x = -26

x = -2

substituting this into Eqn (1):

5(-2) + 6y = 20

-10 + 6y = 20

6y = 30

y = 5

hence:

x = -2,y = 5.

You might be interested in

0.825167 rounded to the nearest ten-thousandth

antoniya [11.8K]

0.825200
(correct me if I’m wrong)

3 0

3 years ago

Help me please i would appreciate it alot (stop answering with things like 'im not sure' just put those in the comments)

OLEGan [10]

#3 would be positive

3 0

3 years ago

Read 2 more answers

5x7=<br> 5x7=5 x (_ + _)<br> 5x7= (5x _) + (5x_)<br> 5x7= _ + _<br> 5x7=

eimsori [14]

5x7=35
5x7=5x(5+2)
5x7=(5x3)+(5x4)
5x7=20+15
5x7=35

This is how I would do it :)

7 0

3 years ago

Read 2 more answers

The cost to mail a letter today is $0.52 and the rate of inflation each year is 2%. In 40 years, how much will you have to pay?

Nastasia [14]

Answer:

94 cents?

Step-by-step explanation:

2%*40=80%

1.80*0.52=0.936

In 40 years, mail may cost about 94 cents.

(I think this is the correct answer ://)

6 0

3 years ago

Awnser please :((((((((((((((((((((

vfiekz [6]

Answer:

I believe it is: 6n+8+7y+4m

Step-by-step explanation:

You can't do anything about the numbers with variables afterwards, so you just list those and you just add and subtract the numbers without variables. Since the top and bottom are the same, you just list it once. Sorry, not the best explanation. Please let me know if I am wrong. It's been a while since I had to any type of algebra.

3 0

3 years ago