q-(4q-7)=5q-(q+21)

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Solution for q-(4q-7)=5q-(q+21) equation:


Simplifying
q + -1(4q + -7) = 5q + -1(q + 21)

Reorder the terms:
q + -1(-7 + 4q) = 5q + -1(q + 21)
q + (-7 * -1 + 4q * -1) = 5q + -1(q + 21)
q + (7 + -4q) = 5q + -1(q + 21)

Reorder the terms:
7 + q + -4q = 5q + -1(q + 21)

Combine like terms: q + -4q = -3q
7 + -3q = 5q + -1(q + 21)

Reorder the terms:
7 + -3q = 5q + -1(21 + q)
7 + -3q = 5q + (21 * -1 + q * -1)
7 + -3q = 5q + (-21 + -1q)

Reorder the terms:
7 + -3q = -21 + 5q + -1q

Combine like terms: 5q + -1q = 4q
7 + -3q = -21 + 4q

Solving
7 + -3q = -21 + 4q

Solving for variable 'q'.

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

Add '-4q' to each side of the equation.
7 + -3q + -4q = -21 + 4q + -4q

Combine like terms: -3q + -4q = -7q
7 + -7q = -21 + 4q + -4q

Combine like terms: 4q + -4q = 0
7 + -7q = -21 + 0
7 + -7q = -21

Add '-7' to each side of the equation.
7 + -7 + -7q = -21 + -7

Combine like terms: 7 + -7 = 0
0 + -7q = -21 + -7
-7q = -21 + -7

Combine like terms: -21 + -7 = -28
-7q = -28

Divide each side by '-7'.
q = 4

Simplifying
q = 4

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