1.3=0.9+y

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Solution for 1.3=0.9+y equation:


Simplifying
1.3 = 0.9 + y

Solving
1.3 = 0.9 + y

Solving for variable 'y'.

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

Add '-1y' to each side of the equation.
1.3 + -1y = 0.9 + y + -1y

Combine like terms: y + -1y = 0
1.3 + -1y = 0.9 + 0
1.3 + -1y = 0.9

Add '-1.3' to each side of the equation.
1.3 + -1.3 + -1y = 0.9 + -1.3

Combine like terms: 1.3 + -1.3 = 0.0
0.0 + -1y = 0.9 + -1.3
-1y = 0.9 + -1.3

Combine like terms: 0.9 + -1.3 = -0.4
-1y = -0.4

Divide each side by '-1'.
y = 0.4

Simplifying
y = 0.4

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