− 7 w + 3 ( w + 6 ) = 30 − 7 w + 3 w + 18 = 30 − 4 w + 18 = 30 ∣ s u b r t a c t 18 f ro m b o t h s i d es − 4 w = 12 ∣ d i v i d e b o t h s i d es b y ( − 4 ) w = − 3
− 7 w + 3 ( w + 6 ) = 30 − 7 w + 3 w + 18 = 30 − 4 w = 12 w = − 3
In mathematics, the variable w represents an unknown quantity. To solve for w , one can use algebraic manipulation, as shown in the example where w is found to be -3. Understanding how to isolate and solve for variables is key in algebra.
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