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3x-2x=4+5
x=9
b) 2x-4+5x=x+2
7x-4=x+2
7x-x=2+4
6x=6 //:6
x=1
c) 2(x+4)-5(x+3)=2
2x+8-5x-15=2
-3x-7=2
-3x=2+7
-3x=9 //(-3)
x=-3
d) -2(x+3)+4(2x+3)=-6
-2x-6+8x+12=-6
6x+6=-6
6x=-6-6
6x=-12 //:6
x=-2
e) (4-2x)-(x+3)=(x-5)+(-3-x)
4-2x-x-3=x-5-3-x TU SKREŚLAMY X i -x
1-3x=-8
-3x=-8-1
-3x=-9 //:(-3)
x=3
f) (3-2x)+(3x+4)=-(3-2x)+(5x+4)
3-2x+3x+4=-3+2x+5x+4
7+x=2x+6
x-2x=6-7
-x=-1 //:(-1)
x=1
PROSZĘ BARDZO :D
3x-5=4+2x
3x-2x=4+5
x=9
b)
2x-4+5x=x+2
2x+5x-x=2+4
6x=6/:6
x=1
c)
2(x+4)-5(x+3)=2
2x+8-5x-15=2
2x-5x=2+15-8
-3x=9/:(-3)
x=-3
d)
-2(x+3)+4(2x+3)=-6
-2x-6+8x+12=-6
-2x+8x=-6-12+6
6x=-12/:6
x=-2
e)
(4-2x)-(x+3)=(x-5)+(-3-x)
4-2x-x-3=x-5-3-x
-2x-x-x+x=-5-3+3-4
-3x=-9/:(-3)
f)
(3-2x)+(3x+4)=-(3-2x)+(5x+4)
3-2x+3x+4=-3+2x+5x+4
-2x+3x-2x-5x=-3+4-3-4
-6x=-6/:(-6)
x=1