7a^2+21b-42=

Solution for 7a^2+21b-42= equation:

Simplifying
7a2 + 21b + -42 = 0

Reorder the terms:
-42 + 7a2 + 21b = 0

Solving
-42 + 7a2 + 21b = 0

Solving for variable 'a'.

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

Add '42' to each side of the equation.
-42 + 7a2 + 42 + 21b = 0 + 42

Reorder the terms:
-42 + 42 + 7a2 + 21b = 0 + 42

Combine like terms: -42 + 42 = 0
0 + 7a2 + 21b = 0 + 42
7a2 + 21b = 0 + 42

Combine like terms: 0 + 42 = 42
7a2 + 21b = 42

Add '-21b' to each side of the equation.
7a2 + 21b + -21b = 42 + -21b

Combine like terms: 21b + -21b = 0
7a2 + 0 = 42 + -21b
7a2 = 42 + -21b

Divide each side by '7'.
a2 = 6 + -3b

Simplifying
a2 = 6 + -3b

Reorder the terms:
-6 + a2 + 3b = 6 + -3b + -6 + 3b

Reorder the terms:
-6 + a2 + 3b = 6 + -6 + -3b + 3b

Combine like terms: 6 + -6 = 0
-6 + a2 + 3b = 0 + -3b + 3b
-6 + a2 + 3b = -3b + 3b

Combine like terms: -3b + 3b = 0
-6 + a2 + 3b = 0

The solution to this equation could not be determined.