3a+4=7a+20

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


Simplifying
3a + 4 = 7a + 20

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

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

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

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

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

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

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

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

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

Simplifying
a = -4

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