All categories

3 years ago

What is 3x+5=2x-7 need step by step explanation

Mathematics

2 answers:

Eddi Din [679]3 years ago

8 0

Answer:

-12

Step-by-step explanation:

3x+5=2x-7

3x-2x+5= -7

x+5= -7

x= -7 - 5

x = -12

Lady bird [3.3K]3 years ago

3 0

Answer:

x=-12

Step-by-step explanation:

Subtract 2x from both sides

3x + 5 - 2x = 2x - 7 - 2x

x + 5 = -7

Now Subtract 5 from both sides

x + 5 - 5 = -7 - 5

x = -12

You might be interested in

Place the first digit

Yuliya22 [10]

1 is the first digit

5 0

4 years ago

Which expression is equivalent to 3(8 + 7)?

natima [27]

Here we MUST follow Order of Operations rules.
Must start out by doing the work inside the parentheses: (8+7) = 15
Next, multiply this result by 3: 3(15)=45 (answer)

You will have to work out the given versions of this problem until you find one that is also equal to 45.

4 0

4 years ago

CAN SOMEONE PLEASE HELP ME WITH THESE PEOPLE

vazorg [7]

Inverse of $f(x)=x+2$ is $f^{-1}(x)=x-2$ because

$f(x)=x+2\Rightarrow x=f^{-1}(x)+2\Rightarrow\boxed{f^{-1}(x)=x-2}$

Now $f^{-1}(-5)=-5-2=\boxed{-7}$ .

Hope this helps.

4 0

3 years ago

Simplify the Expression below [-4x^2/5] [9x/5 ]

Ratling [72]

Answer:

(-36 x^3)/25

Step-by-step explanation:

Simplify the following:

(-4×9 x^2 x)/(5×5)

Combine powers. (9 x (-4) x^2)/(5×5) = (9 x^(2 + 1) 4 (-1))/(5×5):

-(9×4 x^(2 + 1))/(5×5)

2 + 1 = 3:

((-9×4 x^3)/5)/5

9 (-4) = -36:

(-36 x^3)/(5×5)

5×5 = 25:

Answer: (-36 x^3)/25

8 0

3 years ago

PLEASE HELP FAST

alexira [117]

Answer:

The coordinates of B are: (a, b)=(-2, -6)

Step-by-step explanation:

Let (a, b) be the coordinates of the point 'B'.

The midpoint of AB is M(-4, 0)

The coordinates of A are (-6, 6)

The midpoint (x,y) of line joining points (x₁, x₂) and (y₁, y₂)

$x=\frac{x_1+x_2}{2},\:y=\frac{y_1+y_2}{2}$

-4 = (-6+a)/2 and 0 = (6+b)/2

-8=-6+a

-8+6=a

a=-2

0=(6+b)/2

0=6+b

b=-6

Therefore, the coordinates of B are: (a, b)=(-2, -6)

6 0

3 years ago