Question

Me ajudem por favor.

Answer 1

[2/3 . (4-x)]-[7/4.(x+3)] ≥ -6
[2.(4-x)]/3 - [7.(x+3)]/4 ≥ -6
(8 - 2x) / 3 - (7x + 21) / 4 ≥ - 6/1
mmc (3,4,1) = 12

12:3.(8-2x) - 12:4.(7x+21) ≥ 12:1.(-6)
4(8-2x) - 3(7x+21) ≥ 12 . (-6)
32 - 8x - 21x - 63 ≥ -72
-8x -21x ≥ -72 - 32 + 63
-29x ≥ -104 + 63
-29x ≥ -41 .(-1)
29x ≤ 41
x ≤ 41/29