3(0.8+0.4y)+y=9

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Solution for 3(0.8+0.4y)+y=9 equation: 


Simplifying
3(0.8 + 0.4y) + y = 9
(0.8 * 3 + 0.4y * 3) + y = 9
(2.4 + 1.2y) + y = 9

Combine like terms: 1.2y + y = 2.2y
2.4 + 2.2y = 9

Solving
2.4 + 2.2y = 9

Solving for variable 'y'.

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

Add '-2.4' to each side of the equation.
2.4 + -2.4 + 2.2y = 9 + -2.4

Combine like terms: 2.4 + -2.4 = 0.0
0.0 + 2.2y = 9 + -2.4
2.2y = 9 + -2.4

Combine like terms: 9 + -2.4 = 6.6
2.2y = 6.6

Divide each side by '2.2'.
y = 3

Simplifying
y = 3

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