3(w-3)+7w=21

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


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

Reorder the terms:
3(-3 + w) + 7w = 21
(-3 * 3 + w * 3) + 7w = 21
(-9 + 3w) + 7w = 21

Combine like terms: 3w + 7w = 10w
-9 + 10w = 21

Solving
-9 + 10w = 21

Solving for variable 'w'.

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

Add '9' to each side of the equation.
-9 + 9 + 10w = 21 + 9

Combine like terms: -9 + 9 = 0
0 + 10w = 21 + 9
10w = 21 + 9

Combine like terms: 21 + 9 = 30
10w = 30

Divide each side by '10'.
w = 3

Simplifying
w = 3

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