4.9=1.8-.4y

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Solution for 4.9=1.8-.4y equation: 


Simplifying
4.9 = 1.8 + -0.4y

Solving
4.9 = 1.8 + -0.4y

Solving for variable 'y'.

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

Add '0.4y' to each side of the equation.
4.9 + 0.4y = 1.8 + -0.4y + 0.4y

Combine like terms: -0.4y + 0.4y = 0.0
4.9 + 0.4y = 1.8 + 0.0
4.9 + 0.4y = 1.8

Add '-4.9' to each side of the equation.
4.9 + -4.9 + 0.4y = 1.8 + -4.9

Combine like terms: 4.9 + -4.9 = 0.0
0.0 + 0.4y = 1.8 + -4.9
0.4y = 1.8 + -4.9

Combine like terms: 1.8 + -4.9 = -3.1
0.4y = -3.1

Divide each side by '0.4'.
y = -7.75

Simplifying
y = -7.75

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