a) 3x = x + 6
2x = 6
x = 3
Obwód = 4 × 3 = 12
b)
4x - 28 = 2(x + 3)
4x - 28 = 2x + 6
2x = 34
x = 17
Obwód = 17 × 4 = 68
c) [tex] \frac{x}{2} = 1 + \frac{x}{3} \\ 3x = 6 + 2x \\ x = 6[/tex]
Obwód = 6 × 4 = 24
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a) 3x = x + 6
2x = 6
x = 3
Obwód = 4 × 3 = 12
b)
4x - 28 = 2(x + 3)
4x - 28 = 2x + 6
2x = 34
x = 17
Obwód = 17 × 4 = 68
c) [tex] \frac{x}{2} = 1 + \frac{x}{3} \\ 3x = 6 + 2x \\ x = 6[/tex]
Obwód = 6 × 4 = 24