.3a+(.2a-.5)+.2(a+2)=1.3

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Solution for .3a+(.2a-.5)+.2(a+2)=1.3 equation:


Simplifying
0.3a + (0.2a + -0.5) + 0.2(a + 2) = 1.3

Reorder the terms:
0.3a + (-0.5 + 0.2a) + 0.2(a + 2) = 1.3

Remove parenthesis around (-0.5 + 0.2a)
0.3a + -0.5 + 0.2a + 0.2(a + 2) = 1.3

Reorder the terms:
0.3a + -0.5 + 0.2a + 0.2(2 + a) = 1.3
0.3a + -0.5 + 0.2a + (2 * 0.2 + a * 0.2) = 1.3
0.3a + -0.5 + 0.2a + (0.4 + 0.2a) = 1.3

Reorder the terms:
-0.5 + 0.4 + 0.3a + 0.2a + 0.2a = 1.3

Combine like terms: -0.5 + 0.4 = -0.1
-0.1 + 0.3a + 0.2a + 0.2a = 1.3

Combine like terms: 0.3a + 0.2a = 0.5a
-0.1 + 0.5a + 0.2a = 1.3

Combine like terms: 0.5a + 0.2a = 0.7a
-0.1 + 0.7a = 1.3

Solving
-0.1 + 0.7a = 1.3

Solving for variable 'a'.

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

Add '0.1' to each side of the equation.
-0.1 + 0.1 + 0.7a = 1.3 + 0.1

Combine like terms: -0.1 + 0.1 = 0.0
0.0 + 0.7a = 1.3 + 0.1
0.7a = 1.3 + 0.1

Combine like terms: 1.3 + 0.1 = 1.4
0.7a = 1.4

Divide each side by '0.7'.
a = 2

Simplifying
a = 2

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