−3n+2(10n−9)≥-3n+9-3

Answer 1

−3n+2(10n−9) ≥ -3n+9-3
-3n+20n-18 ≥ -3n+9-3
17n-18 ≥ -3n+6
20n ≥ 24
n ≥ 6/5

Answer 2

- 3 n + 2 ( 10 n - 9 ) ≥ - 3 n + 9 - 3

- 3 n + 20 n - 18 ≥ - 3 n + 6

Add 3 n to both sides

20 n - 18 ≥ 6

Add 18 to bpth sides

20 n ≥ 24

Divide both sides by 20

n ≥ 24 / 20

n ≥ 4 ∙ 6 / 4 ∙ 5

n ≥ 6 / 5