Inequalities
ICSE · Class 7 · Mathematics
All formulas from Inequalities in ICSE Class 7 Mathematics. Key equations, constants, and identities for board exam preparation.
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Formulas
3. Rules of Inequations
x > 3 ⇒ x + 5 > 3 + 5 ⇒ x + 5 > 8
x > 4 ⇒ x × -3 < 4 × -3 ⇒ -3x < -12
-2x > 6 ⇒ (-2x)/(-2) < 6/(-2) ⇒ x < -3
4. Solving One-Variable Inequations
30 - 3(2x - 7) < 13 ⇒ 30 - 6x + 21 < 13 ⇒ -6x < -38 ⇒ 6x > 38 ⇒ x > 38/6
30 - 3(2x - 7) > 13 ⇒ x < 6 1/3
3x - 8 < 7 ⇒ 3x < 15 ⇒ x < 5
4x + 5 ≥ 1 ⇒ 4x ≥ -4 ⇒ x ≥ -1
5x - 12 ≤ 8 ⇒ 5x ≤ 20 ⇒ x ≤ 4
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