5 (9-X) ≤ 4 (X+18) blalalalala

x ≥ - 3

Step-by-step explanation:

5 (9-x) ≤4 (x+18)

45-5x≤4x+72

subtract 4 from both sides

45-9x≤72

subtract 45 from both sides

-9x≤27

divide by - 9, but when you divide by a negative in an inequality you have to flip the sign

x≥-3

-3 ≤ x

Step-by-step explanation:

5 (9-X) ≤ 4 (X+18)

Distribute on both sides

45 - 5x ≤ 4x + 72

Add 5x to each side

45 - 5x+5x ≤ 4x+5x + 72

45 ≤ 9x + 72

Subtract 72 from each side

45-72 ≤ 9x + 72 - 72

-27 ≤ 9x

Divide by 9

-27/9 ≤ 9x/9

-3 ≤ x