13x-8=10+4x x=? {rpsze o szybka odpowiedz
13x-8=10+4x /-4x
9x-8=10 /+8
9x=18 /:9
x=2
SPRAWDZENIE:
13x-8=10+4x
13*2-8=10+4*2
26-8=10+8
18=18
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13x-8=10+4x /-4x
9x-8=10 /+8
9x=18 /:9
x=2
13x-8=10+4x /-4x
9x-8=10 /+8
9x=18 /:9
x=2
SPRAWDZENIE:
13x-8=10+4x
13*2-8=10+4*2
26-8=10+8
18=18