Question

Rezolvati ecuatiile :
a) (23-x):6=3
b) 5*(3*x-9)=60
c) (23-5*x):9=2
d) 24:(5-x):9=6
e) 32:(13-5*x)=4
f) 3*x-15:3=19+3
g) 5*x-21:7=4+13
h) 13-14:x=18-7
Va rog frumos sa ma ajutati,am nevoie urgent!!!

Answer 1

a)
(23-x):6=3 |*6
23-x=18
x=23-18
x=5
b)
5*(3*x-9)=60| :5
3*x-9=12
3*x=12+9
3*x=21
x=7
c)
(23-5*x):9=2 |*9
23-5*x=18
5*x=23-18
5*x=5
x=1
d)
24:(5-x)=6 | *(5-x)
6*(5-x)=24 | :6
5-x=4
x=5-4
x=1
e)
32:(13-5*x)=4
4*(13-5*x)=32 | :4
13-5*x=8
5*x=5
x=1
f)
3*x-15:3=19+3
3*x-5=22
3*x=27
x=9
g)
5*x-21:7=4+13
5*x-3=17
5*x=20
x=4
h)
13-14:x=18-7
14:x=13-18+7
14:x=2
2*x=14
x=7