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alexdok [17]
3 years ago
11

Solve this multistep equation: 3x+20 = x + 30

Mathematics
2 answers:
agasfer [191]3 years ago
7 0

Answer:

x=5

Step-by-step explanation:

Subtract 20

from both sides of the equation

2

Simplify

Subtract the numbers

Subtract the numbers

3

Subtract  x

from both sides of the equation

vodka [1.7K]3 years ago
6 0

Answer:

X = 5

Step-by-step explanation:

To solve for x, you need to get x to one side and everything else to the other side.

3x+20=x+30

Since there is only one positive x on the right, we can subtract it from both sides. This moves it over.

2x+20=30

Since there is a +20 on the same side we put our x, we need to subtract it from both sides to move it over.

2x = 10

Now x is being multiplied by 2. To get rid of it, we divide both sides by 2.

x = 5

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Is y = 5 a solution to the inequality below?<br><br> y &gt; 4
Elena-2011 [213]

Answer: Yes and it could be greater than 5 but it has to be greater than 4


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7 0
3 years ago
Read 2 more answers
Help Please!!!!<br> f(x)=-7x+3, D={-12,-4,3,20}
8_murik_8 [283]
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5 0
3 years ago
I do not know how to solve this please help
oksano4ka [1.4K]
You multiply the denominator on one side of the equation by the numerator and vice versa. So for example(S)I'm going to multiply 4 by nine and 3 times n. Then that comes out to 3n=36. After you multiply, you divide from both sides to get the variable by itself. So you would divide both sides by 3 and you're final answer would be n=13. Hope this helped!
8 0
3 years ago
23. * MULTIPLE CHOICE Which is the correct factorization of -45x^2 + 20y^2
skad [1K]

Answer:

c)-5(3x+2y)(3x-2y)

Step-by-step explanation:

1) lets find out if -45 and 20 have a GCF

-45 and 20 are both dividable by -5 so

-5(9x^2-4y^2)

1) you can see that 9 and -4 are perfect square so:

-5(3x+2y)(3x-2y)

            Recheck:

1) lets use FOIL to see if this is right(if its right we will get back our original equation)

-5(9x^2-6xy+6xy-4y^2)

-5(9x^2-4y^2)

-45x^2+20y^2

hope this helps!

7 0
3 years ago
Evaluate:-7/8+-5/11+(-3/8) if u answer it correctly thank u
just olya [345]
-7/8= -77/88
-5/11= -40/88
-3/8= -33/88
(-77/88)+(-40/88)+(-33/88)= -150/88
5 0
3 years ago
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