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julsineya [31]
3 years ago
10

7 times a number is equal to 12 more than three times the number. Find the number.

Mathematics
1 answer:
Sonja [21]3 years ago
6 0
7x=3x+12 
-3x  -3x
4x=12
x=3
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4 0
3 years ago
Please help me ASAP it’s times THANK U
goblinko [34]

Answer:

Only choices C and D are solutions

Step-by-step explanation:

6x + 3y = -15

y = -2x - 5

6x + 3y = -15

6x + 3(-2x - 5) = -15

6x - 6x - 15 = -15

0 = 0

Since 0 = 0 is a true statement, both equations of this system are the same equation and represent a single line on the coordinate plane.

We need to check each choice in just one equation.

Let's use the second equation.

y = -2x - 5

A.

(2, 7)

7 = -2(2) - 5

7 = -4 - 5

7 = -9   False

Not a solution

B.

(5, 0)

0 = -2(5) - 5

0 = -10 - 5

0 = -15     False

Not a solution

C.

(-3, 1)

1 = -2(-3) - 5

1 = 6 - 5

1 = 1   True

Solution

D.

-13 = -2(4) - 5

-13 = -8 - 5

-13 = -13    True

Solution

Answer: Only choices C and D are solutions

7 0
3 years ago
Which option is equivalent to log 7 - log 2? A. log 5 7 B. log O C. log 9 OD. log 72​
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Answer:

la vida mafio

Step-by-step explanation:

mafioaso.

7 0
4 years ago
Solving system by substitution x=3y+11, 2x-3y=16
grin007 [14]
Input 3y+11 for x

2(3y+11)-3y=16
6y+22-3y=16
3y= -6
Divide by 3 to isolate y
y=-2

Now for x....

x=3(-2)+11
=-6+11
=5
x=5

Coordinates (5,-2)
5 0
3 years ago
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Right to explain how this digit 6 changes value in number 666, 666, 666
zvonat [6]
To a higher number the six changes value in this number above
8 0
3 years ago
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