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Ivenika [448]
3 years ago
7

Solve -3(x-2)=2(x-7) and write a reason for each step

Mathematics
2 answers:
seraphim [82]3 years ago
8 0

Answer:

4=x

Step-by-step explanation:

-3(x-2)=2(x-7)

Distribute -3 and 2.

-3x+6=2x-14

Add 3x to both sides of the equation.

6=5x-14

Add 14 to both sides of the equation.

20=5x

Divide 5 from both sides of the equation.

4=x

Hope this helps :)

madreJ [45]3 years ago
7 0

Answer:

x=5

Step-by-step explanation:

Our equation is

-3(x-2)=2(x-7)

First we will distribute -3 and 2, because in math when we have a number being multiplied into parenthesis we multiply both things inside of it

Our equation is now

-3x+6=2x-14

Next we subtract 6 from both sides because we want x to be on only one side

-3x=2x-20

Next we subtract 2x from both sides because we want x to equal something exactly

-5x=-20

Now we divide -5 from both sides because we only want x

x=5

Brainliest please :)

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nexus9112 [7]

Answer:

Assuming what you meant was \frac{1}{2}x + 3 = -x +7, the answer would be x = 8

5 0
3 years ago
If x = -3 calculate the value of: x3 + x
lisabon 2012 [21]
3x+x=y
3(-3)+(-3)=y
-9-3=y
-12=y

Therefore the value of x3+x is -12

7 0
3 years ago
Read 2 more answers
Which shows a perfect square trinomial?
anastassius [24]
The answer is <span>c. 16x2 + 24xy + 9y2.

Since we need trinomial (three term expression) choices a and b are incorrect because they have only two terms.

So, our square trinomial is a</span>² + 2ab + b² or a² - 2ab + b²
a² + 2ab + b² = (a + b)²
a² - 2ab + b² = (a - b)²

Let's check choices c and d:
c) 16x² + 24xy + 9y²
a² = 16x²
a² = (4x)²
a = 4x

b² = 9y²
b² = (3y)²
b = 3y

a² + 2ab + b² = (4x)² + 2 * 4x * 3y + (3y)² = 16x² + 24xy + 9y²
CORRECT

d) 49x² - 70xy + 10y²
a² = 49x²
a² = (7x)²
a = 7x

b² = 10y²
b² = (y√10)²
b = y√10

a² + 2ab + b² = (7x)² + 2 * 7x * y√10 + (y√10)² = 49x² + 14xy√10 + 10y²
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So, c) is correct answer
8 0
4 years ago
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nika2105 [10]
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6 0
3 years ago
Fill in the blanks to solve this equation (ANSWER QUICK)
SVETLANKA909090 [29]

Answer:

Step-by-step explanation:

5+\frac{1}{2} (14b-8)=-6

5+7b-4=-6

7b+1=-6

   -1      -1

7b=-7

/7      /7

b=-1

Answers in order:

7 + 7b - 4 = -6

7b + 1 = -6

7b = -7

b = -1

Hope this helps!

3 0
3 years ago
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