Question

tìm x

a -2x-(x-17)=34-(-x+25)

b 3x-32>-5x+1

c 17+3.(-16x-37)=2x+43-4x

Answer 1

a) -2x - ( x - 17 ) = 34 - ( -x + 25 )

<=> -2x - x + 17 = 34 + x -25

<=> -2x -x - x = 34 - 25 - 17

<=> -4x = -8

<=> x = 2

b) 3x - 32 > -5x + 1

<=> 3x + 5x >1 + 32

<=> 8x > 33

<=> x > \(\dfrac{33}{8}\)

c) 17 + 3 . ( -16x - 37 ) = 2x + 43 - 4x

<=> 17 + ( -48x - 111 ) = -2x + 43

<=> 17 - 48x - 111 = -2x + 43

<=> -48x +2x = 43 - 17 + 111

<=> -46x = 137

<=> x = \(\dfrac{137}{-46}\)

Answer 2

137−46