3a+20=7a

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Solution for 3a+20=7a equation:


Simplifying
3a + 20 = 7a

Reorder the terms:
20 + 3a = 7a

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

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

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

Add '-20' to each side of the equation.
20 + -20 + -4a = 0 + -20

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

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

Divide each side by '-4'.
a = 5

Simplifying
a = 5

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