3a-15=4a+5

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Solution for 3a-15=4a+5 equation:


Simplifying
3a + -15 = 4a + 5

Reorder the terms:
-15 + 3a = 4a + 5

Reorder the terms:
-15 + 3a = 5 + 4a

Solving
-15 + 3a = 5 + 4a

Solving for variable 'a'.

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

Add '-4a' to each side of the equation.
-15 + 3a + -4a = 5 + 4a + -4a

Combine like terms: 3a + -4a = -1a
-15 + -1a = 5 + 4a + -4a

Combine like terms: 4a + -4a = 0
-15 + -1a = 5 + 0
-15 + -1a = 5

Add '15' to each side of the equation.
-15 + 15 + -1a = 5 + 15

Combine like terms: -15 + 15 = 0
0 + -1a = 5 + 15
-1a = 5 + 15

Combine like terms: 5 + 15 = 20
-1a = 20

Divide each side by '-1'.
a = -20

Simplifying
a = -20

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