1.3=-0.9+a

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Solution for 1.3=-0.9+a equation:


Simplifying
1.3 = -0.9 + a

Solving
1.3 = -0.9 + a

Solving for variable 'a'.

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

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

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

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

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

Combine like terms: -0.9 + -1.3 = -2.2
-1a = -2.2

Divide each side by '-1'.
a = 2.2

Simplifying
a = 2.2

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