4.2=1.5-.4y

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Solution for 4.2=1.5-.4y equation: 


Simplifying
4.2 = 1.5 + -0.4y

Solving
4.2 = 1.5 + -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.
4.2 + 0.4y = 1.5 + -0.4y + 0.4y

Combine like terms: -0.4y + 0.4y = 0.0
4.2 + 0.4y = 1.5 + 0.0
4.2 + 0.4y = 1.5

Add '-4.2' to each side of the equation.
4.2 + -4.2 + 0.4y = 1.5 + -4.2

Combine like terms: 4.2 + -4.2 = 0.0
0.0 + 0.4y = 1.5 + -4.2
0.4y = 1.5 + -4.2

Combine like terms: 1.5 + -4.2 = -2.7
0.4y = -2.7

Divide each side by '0.4'.
y = -6.75

Simplifying
y = -6.75

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