3a=5+35-7a

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Solution for 3a=5+35-7a equation: 


Simplifying
3a = 5 + 35 + -7a

Combine like terms: 5 + 35 = 40
3a = 40 + -7a

Solving
3a = 40 + -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.
3a + 7a = 40 + -7a + 7a

Combine like terms: 3a + 7a = 10a
10a = 40 + -7a + 7a

Combine like terms: -7a + 7a = 0
10a = 40 + 0
10a = 40

Divide each side by '10'.
a = 4

Simplifying
a = 4

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