Răspuns :
a) 3-5x=18
5x=18-3
5x=15
x=15:5
x=3
b) 4x-12=27
4x=27+12
4x=39
x=[tex] \frac{39}{4} [/tex]
c) -8y+800=0
-8y= -800
y= -800: (-8)
y=100
d) 3x+72=0
3x= -72
x= -72:3
x= - 24
5x=18-3
5x=15
x=15:5
x=3
b) 4x-12=27
4x=27+12
4x=39
x=[tex] \frac{39}{4} [/tex]
c) -8y+800=0
-8y= -800
y= -800: (-8)
y=100
d) 3x+72=0
3x= -72
x= -72:3
x= - 24
A)3-5x=18
-5x=15
x=-3
B)4x-12=-27
4x=-15
x=-15/4
C)-8y+800=0
--8y=-800
y=100
D)3x+72==0
3x=-72
x=-24
E)7-x=18
-x=11
x=-11=11
F)3-x=11
3-11=x
x=-8=8
-5x=15
x=-3
B)4x-12=-27
4x=-15
x=-15/4
C)-8y+800=0
--8y=-800
y=100
D)3x+72==0
3x=-72
x=-24
E)7-x=18
-x=11
x=-11=11
F)3-x=11
3-11=x
x=-8=8