-2(4.7y-5.4)+10.4y=3.1

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Solution for -2(4.7y-5.4)+10.4y=3.1 equation: 


Simplifying
-2(4.7y + -5.4) + 10.4y = 3.1

Reorder the terms:
-2(-5.4 + 4.7y) + 10.4y = 3.1
(-5.4 * -2 + 4.7y * -2) + 10.4y = 3.1
(10.8 + -9.4y) + 10.4y = 3.1

Combine like terms: -9.4y + 10.4y = 1y
10.8 + 1y = 3.1

Solving
10.8 + 1y = 3.1

Solving for variable 'y'.

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

Add '-10.8' to each side of the equation.
10.8 + -10.8 + 1y = 3.1 + -10.8

Combine like terms: 10.8 + -10.8 = 0.0
0.0 + 1y = 3.1 + -10.8
1y = 3.1 + -10.8

Combine like terms: 3.1 + -10.8 = -7.7
1y = -7.7

Divide each side by '1'.
y = -7.7

Simplifying
y = -7.7

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