rozwiąż równania:
a) x-7=(7-x)-(14-2x)=
b) x-4x+(2x+3) = 6(3-x)=
c) 2x+15=16(1+0,125)=
d) x/6-x/4=x/2+7=
x-7=(7-x)-(14-2x)
x-7=7-x-14+2x
x+x-2x=7+7-14
2x-2x=14-14
0=0
x-4x+(2x+3)=6(3-x)
x-4x+2x+3=18-6x
x-4x+2x+6x=18-3
5x=15 /:5
x=3
2x+15=16(1+0,125)
2x+15=16+2
2x=18-15
2x=3 /:2
x=3/2
x=1i1/2
x/6-x/4=x/2+7 /*12
2x-3x=6x+84
-x-6x=84
-7x=84 /:(-7)
x=-12
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x-7=(7-x)-(14-2x)
x-7=7-x-14+2x
x+x-2x=7+7-14
2x-2x=14-14
0=0
x-4x+(2x+3)=6(3-x)
x-4x+2x+3=18-6x
x-4x+2x+6x=18-3
5x=15 /:5
x=3
2x+15=16(1+0,125)
2x+15=16+2
2x=18-15
2x=3 /:2
x=3/2
x=1i1/2
x/6-x/4=x/2+7 /*12
2x-3x=6x+84
-x-6x=84
-7x=84 /:(-7)
x=-12