Question

Resolva as equações
a)4x-3<17
b)3y-4<5y+6
c)25-2a<10-7a
d)3c+13 e)3x+1/3>2x-3/4

Answer 1

a)
4x - 3 < 17
4x < 17 + 3
4x < 20
x < 20/4
x < 5

b)
3y - 4 < 5y + 6
3y - 5y < 6 + 4
-2y < 10 (-1)
2y > - 10
y > -10/2
y > -5

c)
25 - 2a < 10 - 7a
-2a + 7a < 10 - 25
5a < -15
a < -15/5
a < -3

d)incompleta

e)
3x + 1/3 > 2x -3/4
3x + 1 > 3(2x - 3/4)
3x + 1 > 6x -9/4
4(3x + 1) > 6x - 9
12x + 4 > 6x - 9
12x - 6x > -9 - 4
6x > -13
x > -13/6