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Solve the following equation.

[tex]\[ -x + 7 = -4x - 11 \][/tex]

A. [tex]\( x = 6 \)[/tex]
B. [tex]\( x = -9 \)[/tex]
C. [tex]\( x = -6 \)[/tex]
D. [tex]\( x = 3 \)[/tex]


Sagot :

To solve the equation [tex]\(-x + 7 = -4x - 11\)[/tex], follow these step-by-step instructions:

1. Start with Given Equation:
[tex]\[ -x + 7 = -4x - 11 \][/tex]

2. Isolate the Variable Term:
First, we want to get all the [tex]\(x\)[/tex] terms on one side of the equation and the constant terms on the other side. To do this, add [tex]\(4x\)[/tex] to both sides of the equation:
[tex]\[ -x + 4x + 7 = -4x + 4x - 11 \][/tex]
Simplifying both sides, we get:
[tex]\[ 3x + 7 = -11 \][/tex]

3. Isolate the Constant Term:
Next, we want to isolate the [tex]\(3x\)[/tex] term by subtracting 7 from both sides of the equation:
[tex]\[ 3x + 7 - 7 = -11 - 7 \][/tex]
Simplifying both sides, we get:
[tex]\[ 3x = -18 \][/tex]

4. Solve for [tex]\(x\)[/tex]:
Finally, solve for [tex]\(x\)[/tex] by dividing both sides of the equation by 3:
[tex]\[ x = \frac{-18}{3} \][/tex]
Simplifying gives:
[tex]\[ x = -6 \][/tex]

Therefore, the solution to the equation [tex]\(-x + 7 = -4x - 11\)[/tex] is:
[tex]\[ x = -6 \][/tex]
Among the given options, [tex]\(x = -6\)[/tex] is the correct answer.