7+0.4(6-y)=1.8y-9(y-0.9)

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Solution for 7+0.4(6-y)=1.8y-9(y-0.9) equation:


Simplifying
7 + 0.4(6 + -1y) = 1.8y + -9(y + -0.9)
7 + (6 * 0.4 + -1y * 0.4) = 1.8y + -9(y + -0.9)
7 + (2.4 + -0.4y) = 1.8y + -9(y + -0.9)

Combine like terms: 7 + 2.4 = 9.4
9.4 + -0.4y = 1.8y + -9(y + -0.9)

Reorder the terms:
9.4 + -0.4y = 1.8y + -9(-0.9 + y)
9.4 + -0.4y = 1.8y + (-0.9 * -9 + y * -9)
9.4 + -0.4y = 1.8y + (8.1 + -9y)

Reorder the terms:
9.4 + -0.4y = 8.1 + 1.8y + -9y

Combine like terms: 1.8y + -9y = -7.2y
9.4 + -0.4y = 8.1 + -7.2y

Solving
9.4 + -0.4y = 8.1 + -7.2y

Solving for variable 'y'.

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

Add '7.2y' to each side of the equation.
9.4 + -0.4y + 7.2y = 8.1 + -7.2y + 7.2y

Combine like terms: -0.4y + 7.2y = 6.8y
9.4 + 6.8y = 8.1 + -7.2y + 7.2y

Combine like terms: -7.2y + 7.2y = 0.0
9.4 + 6.8y = 8.1 + 0.0
9.4 + 6.8y = 8.1

Add '-9.4' to each side of the equation.
9.4 + -9.4 + 6.8y = 8.1 + -9.4

Combine like terms: 9.4 + -9.4 = 0.0
0.0 + 6.8y = 8.1 + -9.4
6.8y = 8.1 + -9.4

Combine like terms: 8.1 + -9.4 = -1.3
6.8y = -1.3

Divide each side by '6.8'.
y = -0.1911764706

Simplifying
y = -0.1911764706

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