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Solve the inequality.

[tex]\[ 2(4 + 2x) \geq 5x + 5 \][/tex]

A. [tex]\( x \leq -2 \)[/tex]
B. [tex]\( x \geq -2 \)[/tex]
C. [tex]\( x \leq 3 \)[/tex]
D. [tex]\( x \geq 3 \)[/tex]


Sagot :

To solve the inequality:

[tex]\[ 2(4 + 2x) \geq 5x + 5 \][/tex]

let's follow a step-by-step approach.

1. Expand the expression on the left side:
[tex]\[ 2(4 + 2x) = 2 \cdot 4 + 2 \cdot 2x = 8 + 4x \][/tex]

The inequality now becomes:
[tex]\[ 8 + 4x \geq 5x + 5 \][/tex]

2. Isolate the variable [tex]\( x \)[/tex] on one side:
Subtract [tex]\( 4x \)[/tex] from both sides:
[tex]\[ 8 + 4x - 4x \geq 5x + 5 - 4x \][/tex]

Simplify the inequality:
[tex]\[ 8 \geq x + 5 \][/tex]

3. Solve for [tex]\( x \)[/tex]:
Subtract 5 from both sides to isolate [tex]\( x \)[/tex]:
[tex]\[ 8 - 5 \geq x + 5 - 5 \][/tex]

Simplify:
[tex]\[ 3 \geq x \][/tex]

Or, equivalently:
[tex]\[ x \leq 3 \][/tex]

The solution to the inequality [tex]\( 2(4 + 2x) \geq 5x + 5 \)[/tex] is:

[tex]\[ x \leq 3 \][/tex]

So, the correct answer from the given options is:

[tex]\[ x \leq 3 \][/tex]