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2 years ago

2x+7=19 solving two-step equations

Mathematics

2 answers:

IRINA_888 [86]2 years ago

8 0

Answer:

x=6

Step-by-step explanation:

divide each term by 2 then simplify

olga2289 [7]2 years ago

8 0

Answer:

Step-by-step explanation:

First what you do is you subtract 7 from both sides to get 2x by itself.

2x + 7 - 7 = 19 - 7

2x = 12

Then you divide 2 from both sides to get x by itself.

2x/2 = 12/2

x = 6

Your answer is then x = 6.

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Given m|n, find the value of x. (8x-20) (8x+8)

LiRa [457]

Answer:

x=12

Step-by-step explanation:

(8x-20)+(8x+8)=180

16x-12=180

16x=180+12

16x=192

x=12

6 0

3 years ago

Read 2 more answers

Write 820.341 in scientific notation

Brut [27]

It is =8.20341 x 10^2

5 0

3 years ago

What 468 times 120 divided by 2

cluponka [151]

Answer:

28080

Step-by-step explanation:

Firstly, multiply 468 with 10, which gets you 4680. Then multiply that with 12 which gets you 56160.

After you take that, divide the number by 2.

Final answer is 28080.

7 0

3 years ago

Read 2 more answers

Solve the system. find x,y, and z please show all steps x-y+z=1 x+y+3z=-3 2x-y+2z=0

Mariulka [41]

Solving the system we get, x= -1, y= -2 and z= 0

Step-by-step explanation:

Solving the equations to find x, y and z

$x-y+z=1\,\,\,eq(1)\\x+y+3z=-3\,\,\,eq(2)\\2x-y+2z=0\,\,\,eq(3)$

Adding eq(1) and eq(2)

$x-y+z=1\\x+y+3z=-3\\--------\\2x+4z=-2\,\,\,\,eq(4)\\$

Adding eq(2) and eq(3)

$x+y+3z=-3\\2x-y+2z=0\\----------\\3x+5z=-3\,\,\,eq(5)$

Multiplying eq(4) by 3 and eq(5) by 2

$6x+12z=-6\\6x+10z=-6\\-\,\,\,-\,\,\,\,\,\,\,\,\,\,\,\,\,\,+\\----------\\2z=0\\z=0$

So, value of z =0

Putting value of z in eq(4)

$2x+4z=-2\\2x+4(0)=-2\\2x=-2\\x=-1$

So, value of x = -1

Now putting value of z=0 and x =-1 in equation 1

$x-y+z=1\\-1-y+0=1\\-y=1+1\\-y=2\\y=-2$

So, value of y = -2

So, solving the system we get, x= -1, y= -2 and z= 0

Keywords: Solve the system

Learn more about Solve the system at:

#learnwithBrainly

7 0

3 years ago

If f(x)=-2x+7 and g(x)=x^2-2, what is [f o g](3)? -7 -1 1 7

marusya05 [52]

Hello from MrBillDoesMath!

Answer: 21

Discussion:

g(3) = 3^2 -2 = 9 -2 = 7 =>

f(g(3)) = f ( 7) = 2(7) + 7 = 14 + 7 = 21

Thank you,

MrB

7 0

3 years ago