40-9=6a+7

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Solution for 40-9=6a+7 equation:


Simplifying
40 + -9 = 6a + 7

Combine like terms: 40 + -9 = 31
31 = 6a + 7

Reorder the terms:
31 = 7 + 6a

Solving
31 = 7 + 6a

Solving for variable 'a'.

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

Add '-6a' to each side of the equation.
31 + -6a = 7 + 6a + -6a

Combine like terms: 6a + -6a = 0
31 + -6a = 7 + 0
31 + -6a = 7

Add '-31' to each side of the equation.
31 + -31 + -6a = 7 + -31

Combine like terms: 31 + -31 = 0
0 + -6a = 7 + -31
-6a = 7 + -31

Combine like terms: 7 + -31 = -24
-6a = -24

Divide each side by '-6'.
a = 4

Simplifying
a = 4

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