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Find all real numbers [tex]\( x \)[/tex] such that [tex]\( 4x - 18 \ \textgreater \ 2 \)[/tex] or [tex]\( -17x - 8 \geq -25 \)[/tex].

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Sagot :

Sure! Let's break down the problem and solve the inequalities step-by-step.

### Solving the first inequality:
[tex]\[ 4x - 18 > 2 \][/tex]

1. Add 18 to both sides of the inequality:
[tex]\[ 4x - 18 + 18 > 2 + 18 \][/tex]
[tex]\[ 4x > 20 \][/tex]

2. Divide both sides by 4:
[tex]\[ \frac{4x}{4} > \frac{20}{4} \][/tex]
[tex]\[ x > 5 \][/tex]

### Solving the second inequality:
[tex]\[ -17x - 8 \geq -25 \][/tex]

1. Add 8 to both sides of the inequality:
[tex]\[ -17x - 8 + 8 \geq -25 + 8 \][/tex]
[tex]\[ -17x \geq -17 \][/tex]

2. Divide both sides by -17, and remember to reverse the inequality when dividing by a negative number:
[tex]\[ \frac{-17x}{-17} \leq \frac{-17}{-17} \][/tex]
[tex]\[ x \leq 1 \][/tex]

### Combining the solutions:
The original problem involves the logical "or" operator, so we need to find all [tex]\(x\)[/tex] that satisfy either of the inequalities:
[tex]\[ x > 5 \quad \text{or} \quad x \leq 1 \][/tex]

### Interval Notation:
1. [tex]\( x > 5 \)[/tex] is the interval [tex]\( (5, \infty) \)[/tex]
2. [tex]\( x \leq 1 \)[/tex] is the interval [tex]\( (-\infty, 1] \)[/tex]

Thus, the solution set combining both intervals is:
[tex]\[ (-\infty, 1] \cup (5, \infty) \][/tex]

So, the set of all real numbers [tex]\(x\)[/tex] that satisfy the given inequalities is:
[tex]\[ \boxed{(-\infty, 1] \cup (5, \infty)} \][/tex]