Hitunglah nilai pada X persamaan berikut
a. 2x + 3 = 9
b. 3 x -5 : 7
c. 3x + 2 = x - 1
d) 4x - 3 = 2 x + 7
e) 2(3x - 1) 3 ÷ (x + 2)
f) 3(2x - 2) 2 ÷ (2x - 5)
a. 2x + 3 = 9
b. 3 x -5 : 7
c. 3x + 2 = x - 1
d) 4x - 3 = 2 x + 7
e) 2(3x - 1) 3 ÷ (x + 2)
f) 3(2x - 2) 2 ÷ (2x - 5)
Jawaban:
a. 2x+3= 9
2x= 9-3
x= 3
b. 3x-5/7 =0
3x-5= 7
3x=7-5
x= 2/3
c. 3x+2= x-1
-3x+x = 2+1
-2x= 3
x= -3/2
d. 4x-3 = 2x+7
4x-2x= 7+3
2x= 10
x= 5
e. 2(3x-1) 3÷(x+2)
2(3x-1)× 3 = x+2
6x-2 × 3=x+2
18x-6= x+2
18x-x = 6-2
17x= 4
x= 17/4
f. 3(2x-2 ) 2/(2x-5)
(6x-6) × 2 = (2x-5)
12x-12 = 2x-5
12x-12 = 2x-5
10x = 7
x= 7/10