12у · 0.5у= 8х² (-3 )= 4у -н³ · 3н²= 1.6а²с ·(-2ас)²= -х³у⁴ · 1.4х⁶у⁵=

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Let's solve each equation step by step:

12у - 0.5у = 8x²(-3
Combine like terms
11.5y = -24x
Divide by 11.5
y = -24x²/11.5

4у - н³ · 3н
Simplify the expression
4y - 3h^5

1.6а²s ·(-2aс)
Simplify the expression
1.6a^2 * 4a^2c^
6.4a^4c^2

-х³у⁴ · 1.4х⁶у
Simplify the expression
-1.4x^9y^9

Therefore, the final result is
y = -24x²/11.
4y - 3h^
6.4a^4c^
-1.4x^9y^9