Błagam na jutro mam przykłady z matematyki: a)3x =-18
b)-3x=2x-10
c)2x-2=7-x
d) 1,2x=4,8
e)2(x+1)= x+3
f)y+2y-5=11-y
g)-3x+2=7
h)3x+6=-2x+4
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a)
3x =-18
x=-6
b)
-3x=2x-10
-5x=-10
x=2
c)
2x-2=7-x
3x=9
x=3
d)
1,2x=4,8
x=4
e)
2(x+1)= x+3
2x+2=x+3
x=1
f)
y+2y-5=11-y
4y=16
y=4
g)
-3x+2=7
-3x=5
x=-5/3
h)
3x+6=-2x+4
5x=-2
x=-2/5
a) 3x= - 18 / 3
x= - 6
b)- 3x= 2x - 10
- 3x - 2x = - 10
- 5x= - 10/ ( - 5)
x = 2
c) 2x - 2 = 7 - x
2x + x=7 + 2
3x=9/3
x= 3
d) 1,2x= 4,8/ 1,2
x=4
e) 2 ( x+ 1) = x + 3
2x + 2 = x + 3
2x - x = 3 - 2
x= 1
f) y + 2y - 5 = 11 - y
y+2y + y= 11 + 5
4y= 16/4
y= 4
g) - 3x + 2= 7
- 3x = 7 - 2
- 3x= 5/ (-3)
x = -1 i 2/3
h) 3x + 6 = - 2x + 4
3x + 2x = 4 -6
5x=- 2/ 5
x=- 2/5