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70 - 5x = 38 - x
-4x = -32x | - (-4)
x = 8
Odp. Mama była 5 razy starsza od Tomka 8 lat temu.
2(14 + x) = 38 + x
28 + 2x = 38 + x
x = 10
Odp. Mama będzie 2 razy starsza od Tomka za 10 lat.