.4y+3(-3)=1.2

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Solution for .4y+3(-3)=1.2 equation: 


Simplifying
0.4y + 3(-3) = 1.2

Multiply 3 * -3
0.4y + -9 = 1.2

Reorder the terms:
-9 + 0.4y = 1.2

Solving
-9 + 0.4y = 1.2

Solving for variable 'y'.

Move all terms containing y to the left, all other terms to the right.

Add '9' to each side of the equation.
-9 + 9 + 0.4y = 1.2 + 9

Combine like terms: -9 + 9 = 0
0 + 0.4y = 1.2 + 9
0.4y = 1.2 + 9

Combine like terms: 1.2 + 9 = 10.2
0.4y = 10.2

Divide each side by '0.4'.
y = 25.5

Simplifying
y = 25.5

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