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3 years ago

Solve each equation for the specified variable dx + t =10 solve for x

Mathematics

2 answers:

Aleks [24]3 years ago

8 0

Answer:

dx + t = 10

dx = 10 - t

x = (10 - t) / d

Katyanochek1 [597]3 years ago

3 0

Answer:

$x=\frac{10-t}{d}$

Step-by-step explanation:

$dx + t =10$

Add $-t$ on both sides.

$dx + t -t=10-t$

$dx=10-t$

Divide both sides by $d$ .

$\frac{dx}{d} =\frac{10-t}{d}$

$x=\frac{10-t}{d}$

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3 years ago

Apply Crammer's Rule to find the solution to the following quations .2x + 3y = 1, 3x + y = 5

Bond [772]

Answer:

The solution to the equation system given is:

x = 2
y = -1

Step-by-step explanation:

First, we must know the equations given:

2x + 3y = 1
3x + y = 5

Following Crammer's Rule, we have the matrix form:

$\left[\begin{array}{ccc}2&3\\3&1\end{array}\right] =\left[\begin{array}{ccc}x\\y\end{array}\right] = \left[\begin{array}{ccc}1\\5\end{array}\right]$

Now we solve using the determinants:

$x=\frac{\left[\begin{array}{ccc}1&3\\5&1\end{array}\right]}{\left[\begin{array}{ccc}2&3\\3&1\end{array}\right] } =\frac{(1*1)-(5*3)}{(2*1)-(3*3)} = \frac{1-15}{2-9} =\frac{-14}{-7} = 2$

$y=\frac{\left[\begin{array}{ccc}2&1\\3&5\end{array}\right]}{\left[\begin{array}{ccc}2&3\\3&1\end{array}\right] } =\frac{(2*5)-(3*1)}{(2*1)-(3*3)}=\frac{10-3}{2-9} =\frac{7}{-7}=-1$

Now, we can find the answer which is x= 2 and y= -1, we can replace these values in the equation to confirm the results are right, with the first equation:

2x + 3y = 1
2(2) + 3(-1)= 1
4 - 3 = 1
1 = 1

And, with the second equation:

3x + y = 5
3(2) + (-1) = 5
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3 years ago

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Ask google because I’m so dumb I can’t even read this ! Have a great day I hope you find your answer

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2 years ago

NEED HELP ASAP Solve the system of equations: Y=3x+5 Y=-2x+20

GenaCL600 [577]

Answer:

Step-by-step explanation:

because

4 0

2 years ago

Read 2 more answers

What is the solution to 4/5=20/(x-5)? answer please

viktelen [127]

Answer:

x =30

Step-by-step explanation:

in order to evaluate the solution 4/5=20/(x-5)?

solution

the first step to take is to cross multiply

4/5=20/(x-5)

we have,

5 x 20 = 4 ( x -5)

100 = 4x - 20

combine the like terms

100+20 = 4x

120 = 4x

divide both sides by the coefficient of x

120/4 = 4x/4

30 = x

x =30

therefore the value of x in the expression 4/5=20/(x-5)? is 30

3 0

3 years ago

Read 2 more answers