3a+15=4(a-5)

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


Simplifying
3a + 15 = 4(a + -5)

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

Reorder the terms:
15 + 3a = 4(-5 + a)
15 + 3a = (-5 * 4 + a * 4)
15 + 3a = (-20 + 4a)

Solving
15 + 3a = -20 + 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 = -20 + 4a + -4a

Combine like terms: 3a + -4a = -1a
15 + -1a = -20 + 4a + -4a

Combine like terms: 4a + -4a = 0
15 + -1a = -20 + 0
15 + -1a = -20

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

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

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

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

Simplifying
a = 35

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