-12:3 ×-5×8 hitunglah.... hitunglah 3x+4=2×+9... hitunglah 3 2/5 + 4 1/3

1.-12:3×-5×8=160
2.3x+4=2x+9=3x+2x=4-9
=5x=-5
=x=-5/5
x=-1
3. 3 2/5+4 1/3=
=3 2/5=17/5
=4 1/3=13/3
=17/5+13/3=17/15+13/15
=17/15+13/15=31/15
=31/15

-12 : 3 × -5 × 8
= -4 × -5 × 8
= 20 × 8
= 160

3x + 4 = 2x + 9
3x - 2x = 4 - 9
1x = - 5
x = -5/1
x = -5

3 2/5 + 4 1/3
= 17/5 + 13/3
= 51/15 + 65/15
= 116/15
= 7 11/15