Question

x/3+2/6=3x/2-1/3

3y/2-2=3/4-2y

2(x-5) maior ou igual 3×(x-4)

x-3 (x-2 ) maior ou igual x+5

Answer 1

a)

x/3+2/6=3x/2-1/3

2x+2=9x-2
2x-9x=-2-2
-7x=-4
x=4/7


b)

3y/2-2=3/4-2y
6y-8=3-8y
6y+8y=3+8
14y=11
y=11/14


c)

2(x-5) maior ou igual 3×(x-4)

2x-10 < 3x-12
2x-3x < - 12 +10
-x < - 2---->×(-1)
x > 2



d)


x-3 (x-2 ) maior ou igual x+5

x - 3x-6 > x + 5
-2x-6 > x+5
-2x > 5 + 6
-2x > 11------->*(-1)
2x < - 11
x < - 11/2