4(2.2a+5)=7.8a-15

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Solution for 4(2.2a+5)=7.8a-15 equation: 


Simplifying
4(2.2a + 5) = 7.8a + -15

Reorder the terms:
4(5 + 2.2a) = 7.8a + -15
(5 * 4 + 2.2a * 4) = 7.8a + -15
(20 + 8.8a) = 7.8a + -15

Reorder the terms:
20 + 8.8a = -15 + 7.8a

Solving
20 + 8.8a = -15 + 7.8a

Solving for variable 'a'.

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

Add '-7.8a' to each side of the equation.
20 + 8.8a + -7.8a = -15 + 7.8a + -7.8a

Combine like terms: 8.8a + -7.8a = 1a
20 + 1a = -15 + 7.8a + -7.8a

Combine like terms: 7.8a + -7.8a = 0.0
20 + 1a = -15 + 0.0
20 + 1a = -15

Add '-20' to each side of the equation.
20 + -20 + 1a = -15 + -20

Combine like terms: 20 + -20 = 0
0 + 1a = -15 + -20
1a = -15 + -20

Combine like terms: -15 + -20 = -35
1a = -35

Divide each side by '1'.
a = -35

Simplifying
a = -35

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