3a-20=7a-4

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Solution for 3a-20=7a-4 equation:


Simplifying
3a + -20 = 7a + -4

Reorder the terms:
-20 + 3a = 7a + -4

Reorder the terms:
-20 + 3a = -4 + 7a

Solving
-20 + 3a = -4 + 7a

Solving for variable 'a'.

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

Add '-7a' to each side of the equation.
-20 + 3a + -7a = -4 + 7a + -7a

Combine like terms: 3a + -7a = -4a
-20 + -4a = -4 + 7a + -7a

Combine like terms: 7a + -7a = 0
-20 + -4a = -4 + 0
-20 + -4a = -4

Add '20' to each side of the equation.
-20 + 20 + -4a = -4 + 20

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

Combine like terms: -4 + 20 = 16
-4a = 16

Divide each side by '-4'.
a = -4

Simplifying
a = -4

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