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Orlov [11]
3 years ago
8

the product of 7 and a number increased by 3 is equal to twice the number subtracted from 39 find the number

Mathematics
2 answers:
Vanyuwa [196]3 years ago
4 0
Say x is the number

7x +3 = 39 -2x
Add 2x to each side
9x +3 =39
Subtract 3 from each side 
9x =36
Divide by 9 on each side
x=4

Hope this helped
Neporo4naja [7]3 years ago
4 0

Answer:  The required number is 2.

Step-by-step explanation:  Given that the product of 7 and a number increased by 3 is equal to twice the number subtracted from 39.

We are to find the number.

Let x represents the given number.

Then, according to the given information, we have

7(x+3)=39-2x\\\\\Rightarrow 7x+21=39-2x\\\\\Rightarrow 7x+2x=39-21\\\\\Rightarrow 9x=18\\\\\Rightarrow x=\dfrac{18}{9}\\\\\Rightarrow x=2.

Thus, the required number is 2.

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2 +2 pls give me the answer​
frosja888 [35]

Answer:

4

Step-by-step explanation:

2+2=4

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The hypotenuse and one of the legs of a right triangle form an angle that has a cosine of square root 2 over 2 . What is the mea
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3 years ago
Darren teaches a class of 25 students. He assigns homework 3 times a week, and each assignment consists of 12 problems. How many
kipiarov [429]
I think its 900
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6 0
3 years ago
Read 2 more answers
Solve 90x = 81+25x^2​
qwelly [4]

Answer:

1.8

Step-by-step explanation:

Solve for x

90

x

=

81

+

25

x

2

Subtract

25

x

2

from both sides of the equation.

90

x

−

25

x

2

=

81

Subtract

81

from both sides of the equation.

90

x

−

25

x

2

−

81

=

0

Factor the left side of the equation.

Tap for more steps...

−

(

5

x

−

9

)

2

=

0

Multiply each term in

−

(

5

x

−

9

)

2

=

0

by

−

1

Tap for more steps...

(

5

x

−

9

)

2

=

0

Set the

5

x

−

9

equal to

0

.

5

x

−

9

=

0

Solve for

x

.

Tap for more steps...

x

=

9

5

The result can be shown in multiple forms.

Exact Form:

x

=

9

5

Decimal Form:

x

=

1.8

Mixed Number Form:

x

=

1

4

5

Upgrade to

6 0
3 years ago
Substitution Method<br>2x+5y=-1<br>y=3x+10​
Grace [21]
Substitution for both equations is (-3,1)
8 0
3 years ago
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