Solve 3x + 2 < −4
Linear inequality, worked out line by line the way a teacher would write it.
Answer
| Solution | x < −2 |
| Interval notation | (−∞, −2) |
Step-by-step solution
4 steps-
1 Given3 x + 2 < -4
Solve for x.
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2 Subtract 2 from both sides
Like an equation, an inequality stays true when the same amount is added to or subtracted from both sides. Only multiplying or dividing by a negative number needs extra care: it reverses the sign.
3 x < -6Move the constant terms to the right.
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3 Divide both sides by 3x < -2
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4 Solutionx < -2\qquad \left( -\infty, -2 \right)
Check with test values
| x | Left side | Right side | Holds? |
|---|---|---|---|
| −3 | −7 | −4 | ✓ true |
| −1 | −1 | −4 | ✗ false |
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