Jak rozwiązać równania:
2x-5=17
4x-9=x+12
5x-12=3x+4
6x-18=2x+2
2x-5=17 /+5
2x=22 /2
x=11
4x-9=x+12 /+9
4x=x+21 /-x
3x = 21 /:3
x=7
5x-12=3x+4 /+12
5x=3x+16 /-3x
2x=16 /2
x=8
6x-18=2x+2 /+18
6x=2x+20 /-2x
4x=20 /:4
x=5
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2x-5=17 /+5
2x=22 /2
x=11
4x-9=x+12 /+9
4x=x+21 /-x
3x = 21 /:3
x=7
5x-12=3x+4 /+12
5x=3x+16 /-3x
2x=16 /2
x=8
6x-18=2x+2 /+18
6x=2x+20 /-2x
4x=20 /:4
x=5