.5(a+15)=3a-1.25

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Solution for .5(a+15)=3a-1.25 equation:


Simplifying
0.5(a + 15) = 3a + -1.25

Reorder the terms:
0.5(15 + a) = 3a + -1.25
(15 * 0.5 + a * 0.5) = 3a + -1.25
(7.5 + 0.5a) = 3a + -1.25

Reorder the terms:
7.5 + 0.5a = -1.25 + 3a

Solving
7.5 + 0.5a = -1.25 + 3a

Solving for variable 'a'.

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

Add '-3a' to each side of the equation.
7.5 + 0.5a + -3a = -1.25 + 3a + -3a

Combine like terms: 0.5a + -3a = -2.5a
7.5 + -2.5a = -1.25 + 3a + -3a

Combine like terms: 3a + -3a = 0
7.5 + -2.5a = -1.25 + 0
7.5 + -2.5a = -1.25

Add '-7.5' to each side of the equation.
7.5 + -7.5 + -2.5a = -1.25 + -7.5

Combine like terms: 7.5 + -7.5 = 0.0
0.0 + -2.5a = -1.25 + -7.5
-2.5a = -1.25 + -7.5

Combine like terms: -1.25 + -7.5 = -8.75
-2.5a = -8.75

Divide each side by '-2.5'.
a = 3.5

Simplifying
a = 3.5

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