4w+3(w-7)=21

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Solution for 4w+3(w-7)=21 equation: 


Simplifying
4w + 3(w + -7) = 21

Reorder the terms:
4w + 3(-7 + w) = 21
4w + (-7 * 3 + w * 3) = 21
4w + (-21 + 3w) = 21

Reorder the terms:
-21 + 4w + 3w = 21

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

Solving
-21 + 7w = 21

Solving for variable 'w'.

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

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

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

Combine like terms: 21 + 21 = 42
7w = 42

Divide each side by '7'.
w = 6

Simplifying
w = 6

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