Question

Tentukan penyelesaian dari persamaan berikut!
1.... ( 2x - 1 ) ( x + 8 ) = x ( 2x + 9 )
2.... 1/2 ( x + 3 ) = 1/4 ( 3 x -1 )
3.... 2y + 4 - 4y - 1 = 1
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4 3

Answer 1

1. 2x^2-15x-8=2x^2+9x
             -24x=8
                 x=-1/3
2.1/2x+3/2=3/4x-1/4
        -1/4x=-7/4
              x=7
3. -2y-3=1
      -2y=4
        y=-2

Answer 2

1) 2x^2 +15x-8 = 2x^2 +9x
6x=8
x=8/6=4/3
2) 1/2x + 3/2 = 3/4x-1/4
1/2x-3/4x = -3/2-1/4
-1/4x = -7/4
x= 7
3) -2y+3 = 1
-2y = -2
y=1 
semoga bermanfaat