a-7(3a-9)=

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Solution for a-7(3a-9)= equation:


Simplifying
a + -7(3a + -9) = 0

Reorder the terms:
a + -7(-9 + 3a) = 0
a + (-9 * -7 + 3a * -7) = 0
a + (63 + -21a) = 0

Reorder the terms:
63 + a + -21a = 0

Combine like terms: a + -21a = -20a
63 + -20a = 0

Solving
63 + -20a = 0

Solving for variable 'a'.

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

Add '-63' to each side of the equation.
63 + -63 + -20a = 0 + -63

Combine like terms: 63 + -63 = 0
0 + -20a = 0 + -63
-20a = 0 + -63

Combine like terms: 0 + -63 = -63
-20a = -63

Divide each side by '-20'.
a = 3.15

Simplifying
a = 3.15

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