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3x+2x=-1-4
5x=-5/ :5
x=-1
b) -2(x-2)-7=-5
-2x+4-7=-5
-2x=-5+7-4
-2x=-2/:(-2)
x=1
c) -(x+1)-2(1-x)=-4
-x-1-2+2x=-4
x=-4+1+2
x=-1
d) -3(2-x)-2(1-3x)=10
-6+3x-2+6x=10
9x=10+8
9x=18/:9
x=2
e) 3(x+3)=2(x+4)+x+1
3x+9=2x+8+x+1
3x-2x-x=8+1-9
0=0
Pozdrawiam ;)
3x+2x=-1-4
5x=-5 |:5
x=-1
b) -2(x-2)-7=-5
-2x+4-7=-5
-2x=-5-4+7
-2x=-2 |:(-2)
x=1
c) -(x+1)-2(1-x)=-4
-x-1-2+2x=-4
-x+2x=-4+1+2
x=-1
d) -3(2-x)-2(1-3x)=10
-6+3x-2+6x=10
9x=10+8
9x=18 |:9
x=2
e). 3(x+3)=2(x+4)+x+1
3x+9=2x+8+x+1
3x-2x-x=8+1-9
0=0