Question

Resolva sendo U=Q
a) 4 (2× -1) = -3 (× +2)
b) 5×+27 < × + 4
c) -4× > 20

Answer 1

A) 4( 2x - 1 ) = - 3 ( x + 2 )
8x - 4 = - 3x - 6
8x + 3x = - 6 + 4
11x = - 2
x = - 2/11
B) 5x + 27 < x + 4
5x - x < 4 - 27
4x < - 23
x > - 23/4
C) - 4 x > 20 ( - 1 )
4x > - 20
x > - 20/4
x > - 5