3 years ago

20-x/7=18 how to solveproblem

1 answer:

6 0

20 - x/7= 18
subtract 20 from both sides

-x/7= -2
multiply both sides by 7

-x= -14
divide both sides by -1

x= 14

ANSWER: x= 14

Hope this helps! :)

You might be interested in

How many terms are there in a geometric series if the first term is 4, the common ration is 3 and the sum of the series is 160

Marina CMI [18]

$\bf \qquad \qquad \textit{sum of a finite geometric sequence}
\\\\
S_n=\sum\limits_{i=1}^{n}\ a_1\cdot r^{i-1}\implies S_n=a_1\left( \cfrac{1-r^n}{1-r} \right)\quad 
\begin{cases}
n=n^{th}\ term\\
a_1=\textit{first term's value}\\
r=\textit{common ratio}\\
----------\\
a_1=4\\
r=3\\
S_n=160
\end{cases}$

$\bf 160=4\left( \cfrac{1-3^n}{1-3} \right)\implies 160=4\left( \cfrac{1-3^n}{-2} \right)\implies 160=-2(1-3^n)
\\\\\\
160=2(3^n-1)\implies \cfrac{160}{2}=3^n-1\implies 80=3^n-1
\\\\\\
81=3^n~~
\begin{cases}
81=3\cdot 3\cdot 3\cdot 3\\
\qquad 3^4
\end{cases}\implies 3^4=3^n\implies 4=n$

3 0

3 years ago

One number is 2 less than a second number. Twice the second number is 5 less than 3 times the first. Find the two numbers.

Evgen [1.6K]

Answer:

9 and 11

Step-by-step explanation:

First number = x -2

Second number = x

and 2x = 3(x-2) - 5

2x = 3x - 6 - 5

x = 11

first number = 11-2 = 9

8 0

2 years ago

Find AB if A(0,3) and B(2,7)<br><br> AB= ?

Snezhnost [94]

To get you answer multiply .3 and 2.7

7 0

4 years ago

Choose the graph that represents the equation y = –|x – 1|.

andrew11 [14]

The second photo is the correct graph.

4 0

3 years ago

Which of the following is an arithmetic sequence?

Anna71 [15]

Here is your answer

A. 1,3,5,7,9,11,.....

REASON :

In an AP their is a common difference between two consecutive terms.

i.e. t2-t1=t3-t2=t4-t3=....= constant

The option A satisfies above condition.

HOPE IT IS USEFUL

5 0

3 years ago