-7(4 -2x)=-140

Question

nees to  find how to get what x equals

 

Answer 1

Hi Quincy.

 

We have, 

 

-7(4-2x) = -140

 

In order to solve for x, we need to isolate the x.

 

We do this by moving the other terms and factors to the other side of the equation.  So "undo" a multiplication, we divide.  To undo an addition, we subtract.  The inverse it true, too.

 

So, the first thing we do is divide by -7.  This leaves

 

4-2x = 20

 

Now move the constant, 4 to the right side of the equation by subtracting it

 

-2x = 16

 

Lastly, divide by -2, and

x = -8

Answer 2

We need to isolate x. We start by dividing both sides by -7:

-7(4 - 2x) / -7 = -140 / -7

4 - 2x = 20

Subtract 4 from both sides:

4 - 2x - 4 = 20 - 4

-2x = 16

Divide by -2:

-2x / 2 = 16 / -2

x = -8

 

Check:

-7(4 - 2 * -8) = -140

-7( 4 + 16) = -140

-7 * 20 = -140

-140 = -140

Answer 3

Hi Quincy,

 

First multiply -7 times what's inside the parentheses--> -28 + 14X = -140

 

Add +28 to both sides--> 14X = - 112

 

Divide both sides by 14--> X = - 8

 

Dan