x+3x=28
4x=28/:4
x=7 spr.7+3*7=7+21=28
====
x+x+5=18
2x=18-5
2x=13 /2
x=6,5
===== spr.6,5+6,5+5=13+5=18
3x-3=2x+2
3x-2x=2+3
x=5
========== spr.15-3=10+2=12=12 L=P
2(y-3)=5+4y
2y-6-4y=5
-2y=5+6
-2y=11 /:-2
y=-5,5
--------- spr.-2*-5,5=5+6 11=11 L=p
4(x+3)=5x-19
4x+12=5x-19
4x-5x=-19-12
-x=-31/*-1
x=31
====== spr.4(31+3)=5*31-19 136=136 L=p
2(x+1)=x
2x-x=-2
x=-2
==== spr.2(-2+1)=-2 -2=-2 L=P
4(x-1)=6(1+x)
4x-4=6+6x
-2x=6+4
-2x=10 /:-2
x=-5
====== spr.4(-5-1)=6(1-5) -24=-24 L=P
-3(2x+1)=-(x-4)
-6x-3=-x+4
-5x=4+3
-5x=7 /:-5
x=-7/5
============ spr.-5*-7/5=4+3 7=7 L=P
x+1 - x-1
------ ------ ==--1-/12
2 3 4
6(x+1)-4(x-1)=3
6x+6-4x+4=3
2x=3-4-6
2x=-7 /:2
x=-3,5
=========== L=p
x-4<2
x<6
======
3x-1≥x+3
2x≥4
x≥2
============
5x-4<4x-5
x<9
=======
9x+8≤3(x-4)
9x-3x≤-12-8
6x≤-20
x≤-20/6
x≤-3⅓
4(3x+2)>32
12x+8>32
12x>32-8
12x>24
x>2
========
2(x+1)+x≥4x
2x+2+x≥4x
2x+x-4x≥-2
-x≥-2 /-1
x≤2
===========
5(x-4)≥ -3(2x+3)
5x-20≥-6x-9
5x+6x≥-9+20
11x≥11 /:11
x≥1
==========
2(3-2x)-3<3(x-1)
6-4x-3<3x-3
-4x-3x<-3+3-6
-7x<-6 /:-7
x>6/7
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x+3x=28
4x=28/:4
x=7 spr.7+3*7=7+21=28
====
x+x+5=18
2x=18-5
2x=13 /2
x=6,5
===== spr.6,5+6,5+5=13+5=18
3x-3=2x+2
3x-2x=2+3
x=5
========== spr.15-3=10+2=12=12 L=P
2(y-3)=5+4y
2y-6-4y=5
-2y=5+6
-2y=11 /:-2
y=-5,5
--------- spr.-2*-5,5=5+6 11=11 L=p
4(x+3)=5x-19
4x+12=5x-19
4x-5x=-19-12
-x=-31/*-1
x=31
====== spr.4(31+3)=5*31-19 136=136 L=p
2(x+1)=x
2x-x=-2
x=-2
==== spr.2(-2+1)=-2 -2=-2 L=P
4(x-1)=6(1+x)
4x-4=6+6x
-2x=6+4
-2x=10 /:-2
x=-5
====== spr.4(-5-1)=6(1-5) -24=-24 L=P
-3(2x+1)=-(x-4)
-6x-3=-x+4
-5x=4+3
-5x=7 /:-5
x=-7/5
============ spr.-5*-7/5=4+3 7=7 L=P
x+1 - x-1
------ ------ ==--1-/12
2 3 4
6(x+1)-4(x-1)=3
6x+6-4x+4=3
2x=3-4-6
2x=-7 /:2
x=-3,5
=========== L=p
x-4<2
x<6
======
3x-1≥x+3
2x≥4
x≥2
============
5x-4<4x-5
x<9
=======
9x+8≤3(x-4)
9x-3x≤-12-8
6x≤-20
x≤-20/6
x≤-3⅓
4(3x+2)>32
12x+8>32
12x>32-8
12x>24
x>2
========
2(x+1)+x≥4x
2x+2+x≥4x
2x+x-4x≥-2
-x≥-2 /-1
x≤2
===========
5(x-4)≥ -3(2x+3)
5x-20≥-6x-9
5x+6x≥-9+20
11x≥11 /:11
x≥1
==========
2(3-2x)-3<3(x-1)
6-4x-3<3x-3
-4x-3x<-3+3-6
-7x<-6 /:-7
x>6/7
=======