3(x+1)=15?

3(x + 1) = 15

3x + 3 = 15

∴ 3x = 15 - 3

∴ 3x = 12

∴ x = 12/3

∴ x = 4

Divide both sides by 3 and get:
x+1 = 5
subtract 1 from both sides and get
x=4

Multiply the three out. You get 3x + 3 = 15.
Subtract three from both sides. You get 3x = 12
Then divide by 3. You get x = 4.

x = 4. Divide both sides by 3, then subtract 1 from both sides. There's x.

x=4

3(x + 1) = 15
3x + 3 = 15
3x = 12
x = 4.

3(x+1)=15
x+1=15/3
x+1=5
x=5-1
x=4
Answer: 4

3(x + 1) = 15
x + 1 = 5
x = 4

3(x + 1) = 15
x = 4

1.) Distribute the 3: 3(x +1)=15 ---> 3x+3=15
2.) Subtract 3 from both sides, first step in isolating x: 3x+3=15 ---> 3x=12
3.) Divide both sides by 3, isolating x: 3x=12 ---> x=4
x=4