7a+3(a-7)-6(b-7)=

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Solution for 7a+3(a-7)-6(b-7)= equation:


Simplifying
7a + 3(a + -7) + -6(b + -7) = 0

Reorder the terms:
7a + 3(-7 + a) + -6(b + -7) = 0
7a + (-7 * 3 + a * 3) + -6(b + -7) = 0
7a + (-21 + 3a) + -6(b + -7) = 0

Reorder the terms:
7a + -21 + 3a + -6(-7 + b) = 0
7a + -21 + 3a + (-7 * -6 + b * -6) = 0
7a + -21 + 3a + (42 + -6b) = 0

Reorder the terms:
-21 + 42 + 7a + 3a + -6b = 0

Combine like terms: -21 + 42 = 21
21 + 7a + 3a + -6b = 0

Combine like terms: 7a + 3a = 10a
21 + 10a + -6b = 0

Solving
21 + 10a + -6b = 0

Solving for variable 'a'.

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

Add '-21' to each side of the equation.
21 + 10a + -21 + -6b = 0 + -21

Reorder the terms:
21 + -21 + 10a + -6b = 0 + -21

Combine like terms: 21 + -21 = 0
0 + 10a + -6b = 0 + -21
10a + -6b = 0 + -21

Combine like terms: 0 + -21 = -21
10a + -6b = -21

Add '6b' to each side of the equation.
10a + -6b + 6b = -21 + 6b

Combine like terms: -6b + 6b = 0
10a + 0 = -21 + 6b
10a = -21 + 6b

Divide each side by '10'.
a = -2.1 + 0.6b

Simplifying
a = -2.1 + 0.6b

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