Question

A) tentukan himpunan penyelesaian dari : 9x+2(x-5)kurang dr sama dng 3x+10 . b) 2(x+1)+3lbh dr sma dngn 12. thx

Answer 1

A)
9x+2x-10kurangdr sama dg 3x+10
11x-10 krg dr sma dg 3x+10
11x-3x krg dr sma dg 10+10
8x krg dr sma dg 20
x krg dr sma dg 20/8
hp= {xIx krg dr sm dg 20/8}

b)
2x+2+3lbh dr sma dg 12
2x+5 lbh dr sma dg 12
2x lbh dr sma dg 12-5
2x lbh dr sma dg 7
x lbh dr sma dg 7/2
hp={xIx lbh dr sma dg 7/2}