4 ( x + 3 ) = 9 x + 16 + 3 x 4 x + 12 = 9 x + 16 + 3 x 4 x + 12 = 12 x + 16 ∣ s u b t r a c t 4 x 12 = 8 x + 16 ∣ s u b t r a c t 16 − 4 = 8 x ∣ d i v i d e b y 8 x = − 2 1
4 ( x + 3 ) = 9 x + 16 + 3 x 4 x + 12 = 12 x + 16 8 x = − 4 x = − 8 4 = − 2 1
To solve the equation 4 ( x + 3 ) = 9 x + 16 + 3 x , distribute and combine like terms to obtain x = − 2 1 . The steps include distributing, combining like terms, rearranging, and then isolating x .
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