Question

What value of x makes the equation -5x - (-7 - 4x) = -2(3x - 4) tru

Answer 1

Answer: 1/10 or 0.1

Explanation:

-(-7 - 4x) = -2(3x - 4)

7 + 4x = -6x + 8

* subtract 7 from both sides

4x = -6x + 1

* Add 6x to both sides

10 x = 1

* Divide both sides by 10

x = 1/10 or 0.10

Answer 2

Well, you’re going to start by simplifying each side of the equation.

This step makes sure that you know to distribute the negative.

-5x + [-(-7-4x)] = -2(3x-4)

Continue to simplify. Start by distributing across the parentheses.

-5x+(7+4x)= -6x+8
-5x+4x+7= -6x+8
-x+7=-6x+8

Once you can’t simplify either side any more, you try and isolate the variable onto one side.

-x+7=-6x+8
+x. +x
________
7=-5x+8

Then isolate the constants into one side.

7=-5x+8
-8. -8
______
-1=-5x

Then make sure you have the variable being multiplied only once.

-1= -5x
—. —
-5. -5

0.2=x

And then move your variable to the left.

x=0.2

The value of x that makes the equation true is 0.2


I hope that helps!!