№171

1) = -1⁹⁻⁷=-1²

2) = -1⁸⁻⁷=-1¹

3) = = 6⁶⁻⁷=6⁻¹

4) = 6¹³⁻⁵=6⁸

№172

1) x : 3² = 3³

x = 3³ : 3²

x = 1¹

2) x : 2⁴ = 2²

x = 2⁴ : 2²

x = 1²

3) x * 2⁶ = 2⁸

x = 2⁸ * 2⁶

x = 2¹⁴

4) x * 3⁵ = 3⁸

x = 3⁸ * 3⁵

x = 9¹³