3a-10a=7

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Solution for 3a-10a=7 equation: 


Simplifying
3a + -10a = 7

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

Solving
-7a = 7

Solving for variable 'a'.

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

Divide each side by '-7'.
a = -1

Simplifying
a = -1

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