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Len [333]
3 years ago
7

Find the value of x.

Mathematics
2 answers:
DanielleElmas [232]3 years ago
7 0

Answer:

x = -7

Step-by-step explanation:

Make an equation:

3x + 33 = 12

3x = -21

x = -7

zalisa [80]3 years ago
3 0

Answer:

x = -7

Step-by-step explanation:

form an equation.

14 + x + 2x + 19 = 12

like terms together;

x + 2x = 12 - 14 - 19

simplify;

3x = -21

divide both sides by 3;

x = -7

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2a - 3b = -11<br> a + 3b = 8
dlinn [17]

Answer:

b = 3 and a = -1

Step-by-step explanation:

You have your given equation:

2a - 3b = -11

a + 3b = 8

You need to find what a and b is.

To find b:

2a - 3b = -11

-2a - 6b = -16

I multiplied a + 3b = 8 by -2. When you multiply a number you have to multiply all of them. You have to choose a number that would cancel out all of a.

So now your equation would look like this when you solve for b:

2a - 3b = -11

-2a - 6b = -16

-------------------

a - 9 = -27 then you divide -9 to -27 which is 3 so b = 3.

To find a:

2a - 3b = -11

a + 3b = 8

I multiplied a + 3b = 8 by -1 and 2a - 3b = -11 by -1 as well.

Your equation will look like this when you solve for a:

-2a + 3b = 11

-1a - 3b = -8

------------------

-3a = 3 then divide -3 to 3 which is -1 so a = -1.

Check to see if you have the correct answer by plugging in the number you got for a and b into the equation and solve.

1. 2(-1) -3(3) = -11

 -2 - 9 = -11

2. -1 + 3(3) = 8

   -1 + 9 = 8

8 0
3 years ago
AREA OF COMPOSITE SHAPES<br><br> SOMEONE PLEASE HELP ASAP
gtnhenbr [62]

Answer:

Step-by-step explanation:

Up - 8

Down - 8

     ⨆

8•8=64

7 0
3 years ago
Find the square root. <br> -√1/9
harina [27]

Answer:

-1/9

that's the answer.

BRAINLIEST PLEASE

4 0
3 years ago
Similar triangles and polygons worksheet<br> help with number 1
xxTIMURxx [149]
Yesyesyesyes yesyeso online
8 0
3 years ago
PLEASE HELP!
elena-14-01-66 [18.8K]
The answer is 15 because absolute deviation means a number of units a certain number is for 0. So, both 15 and -15 would have an absolute deviation of 15 because both numbers are 15 units away from 0. Hope I helped! Please rate me the Brainliest!
6 0
3 years ago
Read 2 more answers
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