0.4y+3=1.2y-9

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Solution for 0.4y+3=1.2y-9 equation:


Simplifying
0.4y + 3 = 1.2y + -9

Reorder the terms:
3 + 0.4y = 1.2y + -9

Reorder the terms:
3 + 0.4y = -9 + 1.2y

Solving
3 + 0.4y = -9 + 1.2y

Solving for variable 'y'.

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

Add '-1.2y' to each side of the equation.
3 + 0.4y + -1.2y = -9 + 1.2y + -1.2y

Combine like terms: 0.4y + -1.2y = -0.8y
3 + -0.8y = -9 + 1.2y + -1.2y

Combine like terms: 1.2y + -1.2y = 0.0
3 + -0.8y = -9 + 0.0
3 + -0.8y = -9

Add '-3' to each side of the equation.
3 + -3 + -0.8y = -9 + -3

Combine like terms: 3 + -3 = 0
0 + -0.8y = -9 + -3
-0.8y = -9 + -3

Combine like terms: -9 + -3 = -12
-0.8y = -12

Divide each side by '-0.8'.
y = 15

Simplifying
y = 15

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