Question

Me ajudem a resolver esses 3 itens pfv

Answer 1

a) 5x-2x+4≥1-3+4x
3x+4≥2+4x
3x-4x≥2-4
-1x≥-2
x≥2

b)3x+3/2-x-1/4≤1/2
12x+12-x-1/4≤1/2
11x+11/4≤1/2
11x≤1/2.4-11
11x≤4/2-11
11x≤4-22/2
11x≤-18/2
x≤-18/2/11
x≤-18/2.1/11
x≤-18/22
x≤-9/11


c)15x+5/2-3x/4>5-15x/8+18/3
30x+10-3x/4>15-45x+144/24
27x+10/4>159-45x/24
27x>159-45x/24.4-10
27x>636-180x/24-10
27x>636-180x-240/24
27x>396-180x/24
27x.24>396-180x
648x+180x>396
828x>396
x>396/828
x>11/23