Question

Ajutatima va rog.. Imi trebue pe miine.
Rezolvati ecuatiile:
a)5*(x+9)=135
b) 12*(x-5)=144
c)15*(18-x)=180
d)63 / (x-2)=7
e) 9*(2x+1)153
f) 14x+28x =588
Dau coroana si multe puncte ..........
AJUTORRRRRR

Answer 1

a) 
5*(x+9)=135
x+9=135:5
x+9=27
x=27-9
x=18
b)
12*(x-5)=144
x-5=144:12
x-5=12
x=12+5
x-17
c)
15*(18-x)=180
18-x=180:15
18-x=12
x=18-12
x=6
d)
63 / (x-2)=7
x-2=63:7
x-2=9
x=9+2
x=11
e)
9*(2x+1)=153
2x+1=153:9
2x+1=17
2x=17-1
2x=16
x=16:2
x=8
f)
14x+28x =588
42x=588
x=588:42
x=14