Question

Exercitiul 9, va rogg multt !!

Answer 1

a) 5x//3-4=1/4
20x- 16=4
20x=4+16
x=20÷20
x=1

b)4x +1/3=15/10
4x+1/3=3/2
24x+2=9
24x=9-2
x=7/24


c) (x-1)÷9/11= 11/9
x-1=9/11*11/9
x-1=1
x=2

d)2x+2,5= -1,25
2x=-2,5-1,25
2x= - 3,75
x= -375/10*1/2
x= -75/4

e) 15/7 -x=3/14
15/7-3/14=x
30-6= 14x
24=14x
x=24/14
x=12/7

f)(x-8/15)=7/3
(15x-8) /15= 7/3
 3*(15x-8)=7*15 |÷3
15x - 8= 35
15x= 35+8
x= 43/15