3a+20=4a+-15

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Solution for 3a+20=4a+-15 equation:


Simplifying
3a + 20 = 4a + -15

Reorder the terms:
20 + 3a = 4a + -15

Reorder the terms:
20 + 3a = -15 + 4a

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

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

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