10-3(a-a)=1+a

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Solution for 10-3(a-a)=1+a equation: 


Simplifying
10 + -3(a + -1a) = 1 + a

Combine like terms: a + -1a = 0
10 + -3(0) = 1 + a

Multiply -3 * 0
10 + 0 = 1 + a

Anything times zero is zero.
10 + 0 = 1 + a

Combine like terms: 10 + 0 = 10
10 = 1 + a

Solving
10 = 1 + a

Solving for variable 'a'.

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

Add '-1a' to each side of the equation.
10 + -1a = 1 + a + -1a

Combine like terms: a + -1a = 0
10 + -1a = 1 + 0
10 + -1a = 1

Add '-10' to each side of the equation.
10 + -10 + -1a = 1 + -10

Combine like terms: 10 + -10 = 0
0 + -1a = 1 + -10
-1a = 1 + -10

Combine like terms: 1 + -10 = -9
-1a = -9

Divide each side by '-1'.
a = 9

Simplifying
a = 9

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