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BARSIC [14]
2 years ago
5

Complete the solution of the equation Find the value of y when x equals 11. 7x-9y=23

Mathematics
1 answer:
Setler79 [48]2 years ago
8 0
Replace the variable x with it's value in the equation and solve for y.

7(11) - 9y = 23

77 - 9y = 23

Subtract both sides by 77.

77 - 9y - 77 = 23 - 77

-9y = -54

Divide both sides by -9.

-9y / -9 = -54 / -9

y = 6

So, 6 is the answer.
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I need help to answer this
Anna [14]
Subtract 59 from both sides, you get x=-179
6 0
3 years ago
\large -6x+6y=6<br> \large 6x+3y=12
Kaylis [27]

Answer:

the solution of the system is:

x = 1 and y = 2.

Step-by-step explanation:

I suppose that we want to solve the equation:

-6*x + 6*y = 6

6*x + 3*y = 12

To solve this, we first need to isolate one of the variables in one of the equations.

Let's isolate y in the first equation:

6*y = 6 + 6*x

y = (6 + 6*x)/6

y = 6/6 + (6*x)/6

y = 1 + x

Now we can replace this in the other equation:

6*x + 3*(1 + x) = 12

6*x + 3 + 3*x = 12

9*x + 3 = 12

9*x = 12 - 3 = 9

x = 9/9 = 1

Now that we know that x = 1, we can replace this in the equation "y = 1 + x" to find the value of y.

y = 1 + (1)  = 2

Then the solution of the system is:

x = 1 and y = 2.

6 0
3 years ago
What is 1 1/4÷ by 3 4/5
spin [16.1K]

let's firstly convert the mixed fractions to improper fractions and then divide.

\bf \stackrel{mixed}{1\frac{1}{4}}\implies \cfrac{1\cdot 4+1}{4}\implies \stackrel{improper}{\cfrac{5}{4}}~\hfill \stackrel{mixed}{3\frac{4}{5}}\implies \cfrac{3\cdot 5+4}{5}\implies \stackrel{improper}{\cfrac{19}{5}} \\\\[-0.35em] ~\dotfill\\\\ \cfrac{5}{4}\div\cfrac{19}{5}\implies \cfrac{5}{4}\cdot \cfrac{5}{19}\implies \cfrac{25}{76}

4 0
3 years ago
Read 2 more answers
Work out 2/3 X 2 plz help
Romashka [77]
 \frac{2}{3} × 2
2 = \frac{2}{1}

Numerator × numerator
Denominator × denominator

\frac{2}{3} × \frac{2}{1}
\frac{4}{3}
7 0
3 years ago
If u can type 40 per min how many hours would it take to type 2.6 x 10 to power of 5 words
JulijaS [17]
The answer is 260000
3 0
3 years ago
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