rozwiąż równania:
1) 1-3(5-2x)=7
2) 2x-7=3+8x
3) 3(2x-4)=6-12(3-x)
4) 2x-3(x-4)=12-2x
PILNE
1)
1-15+6x=7
6x=7-1+15
6x=21 /:6
x=21/6
x=3i1/2
2)
2x-7=3+8x
2x-8x=3+7
-6x=10 /:(-6)
x=-10/6
x=-1i2/3
3)
6x-12=6-36+12x
6x-12x=6-36+12
-6x=-18 /:(-6)
x=3
4)
2x-3x+12=12-2x
-x+2x=12-12
x=0
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1)
1-15+6x=7
6x=7-1+15
6x=21 /:6
x=21/6
x=3i1/2
2)
2x-7=3+8x
2x-8x=3+7
-6x=10 /:(-6)
x=-10/6
x=-1i2/3
3)
6x-12=6-36+12x
6x-12x=6-36+12
-6x=-18 /:(-6)
x=3
4)
2x-3x+12=12-2x
-x+2x=12-12
x=0