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9 + 4(x - 1) = 25

First, subtract 9 from both sides. / Your problem should look like: 4(x - 1) = 25 - 9
Second, simplify 25 - 9 to get 16. / Your problem should look like: 4(x - 1) = 16
Third, divide both sides by 4. / Your problem should look like: x - 1 = \(\frac{16}{4}\)
Fourth, simplify \(\frac{16}{4}\) to get 4 (4 × 4 = 16) / Your problem should look like: x - 1 = 4
Fifth, add 1 to both sides. / Your problem should look like: x = 4 + 1
Sixth, add 4 + 1 to get 5. / Your problem should look like: x = 5

Answer: x = 5


9+4(x−1)=25

Simplify:

9+4(x−1)=25

9+(4)(x)+(4)(−1)=25(Distribute)

9+4x+−4=25

(4x)+(9+−4)=25(Combine Like Terms)

4x+5=25

Subtract 5 from both sides.

4x+5−5=25−5

4x=20

Divide both sides by 4.

4x/4=20/4

x=5


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