:D Bardzo proszę o Rozwiązanie wszystkich ;)
a) 5x+11=21
b) 5+2y=17
c) 27=3n-21
d) 3a-7+2a+3=19
e) 5b+5-b-10=1
f) 5d-11-d+8=0
g) 3(x+5)=27
h) 2(x-3)+3(4-x)=5
i) 3(x-4)-2(2x-5)=-4
j) -(x+3)+(2x-1)=(1+4x)+(3x)
k) 3(-3x)+2x=8-2(x-1)
l) x/3-5/6=1/12-x/2
ł) 3+ 8+x/2 = 2x+13
m) x+5/10 + 2x+5/2 =2-x/5
" Life is not a problem to be solved but a reality to be experienced! "
© Copyright 2013 - 2024 KUDO.TIPS - All rights reserved.
a) 5x+11=21 |-11
5x =10 |:5
x=2
b) 5+2y=17 |-5
2y=12 |:2
y=6
c) 27=3n-21 |+21
3n=48 |:3
n=16
d) 3a-7+2a+3=19
5a-4=19 |+4
5a=23 |:5
a=4⅗
e) 5b+5-b-10=1
4b-5=1 |+5
4b=6 |:4
b=1½
f) 5d-11-d+8=0
4d-3=0 |+3
4d=3 |:4
d=¾
g) 3(x+5)=27
3x +15=27 |-15
3x=12 |:3
x=4
h) 2(x-3)+3(4-x)=5
2x-6 +12 -3x =5
-x+6=5 |-6
-x=-1 |*(-1)
x=1
i) 3(x-4)-2(2x-5)=-4
3x-12-4x+10=-4
-x-2=-4 |+2
-x=-2
x=2
j) -(x+3)+(2x-1)=(1+4x)+(3x)
-x-3+2x-1=1+4x+3x
x-4=7x+1 |-7x
-6x-4=1 |+4
-6x=5 |:(-6)
x=-⅚
k) 3(-3x)+2x=8-2(x-1)
-9x+2x=8-2x+2
-7x=-2x+10 |+2x
-5x=10 |:(-5)
x=-2
l) x/3-5/6=1/12-x/2 |*12
4x-10=1-6x |+6x
10x-10=1 |+10
10x=11 |:10
x=1,1
ł) 3+ 8+x/2 = 2x+13 |*2
6+8+x=4x+26
14+x=4x+26 |-4x
-3x+14=26 |-14
-3x=12 |:(-3)
x=-4
m) x+5/10 + 2x+5/2 =2-x/5 |*10
x+5+5(2x+5)=2(2-x)
x+5+10x+25=4-2x
11x+30=4-2x |+2x
13x+30=4 |-30
13x=-26 |:13
x=-2
a)5x+11=21
5x=21-11
5x=10
x=10:5
x=2
b)5+2y=17
2y=17-5
2y=12
y=12:2
y=6
c)27=3n-21
27+21=3n
48=3n
n=-48:3
n=16
d)3a-7+2a+3=19
3a+2a=19+7-3
5a=23
a=23:5
a=4,6
e)5b+5-b-10=1
5b-b=1+10-5
4b=6
b=6:4
b=1,5
f)5d-11-d+8=0
5d-d=0+11-8
4d=3
d=3:4
d=0,75
g)3(x+5)=27
3x+15=27
3x=27-15
3x=12
x=12:3
x=4
h)2(x-3)+3(4-x)=5
2x-6+12-3x=5
2x-3x=5+6-12
-x=-1
x=-1;(-1)
x=1
i)3(x-4)-2(2x-5)=-4
3x-12-4x+10=-4
3x-4x=12-10-4
-x=-2
x=-2:(-1)
x=2
j)-(x+3)+(2x-1)=(1+4x)+(3x)
-x+3+2x-1=1+4x+3x
-x+2x-4x-3x=1+1-3
-3x=-1
x=-1:(-3)
x=0,3
k)3(-3x)+2x=8-2(x-1)
-9x+2x=8-2x-2
-9x+2x+2x=8-2
-5x=6
x=6:(-5)
x=-2
l)x/3-5/6=1/12-x/2
x/3+x/2=1/12+5/6
2x/6+3x/6=1/12+10/12
5x/6=11/12
x=11/12:5/6=11/12*6/5(trzeba skrócić)=11/10
x=1,1