7a=2(9-10)

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Solution for 7a=2(9-10) equation: 


Simplifying
7a = 2(9 + -10)

Combine like terms: 9 + -10 = -1
7a = 2(-1)

Multiply 2 * -1
7a = -2

Solving
7a = -2

Solving for variable 'a'.

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

Divide each side by '7'.
a = -0.2857142857

Simplifying
a = -0.2857142857

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