4 1 2,1 : y = 2 -- : 3 -- 5 5 -3(2,1x-4)-4,2=1,2*(-5x+0,5)

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вопрос

To simplify the given expression, we need to distribute and combine like terms.

Starting with the left side of the equation:

-3(2,1x-4) - 4,2
-3 2,1x - (-3 4) - 4,2
-6,3x + 12 - 4,2
-6,3x + 7,8

Now, simplifying the right side of the equation:

1,2 (-5x + 0,5)
1,2 -5x + 1,2 * 0,5
-6x + 0,6

Putting it all together:

-6,3x + 7,8 = -6x + 0,6

This is the simplified form of the given equation.