Matematika

Pertanyaan

a. 9(h+1)-3h<10(h-1)-5
b. -2(5x+4)-x>3-(6x-5)
c. -3(x+4)-3x>1-(8x-6)

2 Jawaban

  • A. 9h + 9 - 3h < 10h - 10 -5
        6h + 9 < 10h - 15
        6h - 10h < -15 - 9
               -4h < -24
                  h > 6

    B. -10x - 8 - x > 3 - 6x + 5
        -11x - 8 > -6x + 8
        -11x + 6x > 8 + 8
        -5x > 16
           x < -3,2

    C. -3x - 12 - 3x > 1 - 8x + 6
        -6x - 12 > -8x + 7
       -6x + 8x > 7 +12
        2x > 19
        x > 9,5
  • A.
    9(h+1)-3h<10(h-1)-5
    9h+9-3h<10h-10-5
    6h+9<10h-15
    6h-10h<-9-15
    -4h<-24
    (-1/4) (-4) h > (-1/4) (-24)
    h>6

    B.
    -2(5x+4)-x>3-(6x-5)
    -10x-8-x>3-6x+5
    -11x-8>8-6x
    -11x+6x>8+8
    -5x>16
    (-1/5) (-5) x < (-1/5) (16)
    x<- 16/5

    C.
    -3(x+4)-3x>1-(8x-6)
    -3x-12-3x>1-8x+6
    -6x-12>7-8x
    -6x+8x>7+12
    (1/2) (2) x > (1/2) (19)
    x>19/2

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