Question

3(x + 4) = 18 (Given)

3x + 12 = 18 (Distributive Property)
3x = 6 (Subtraction)
x = 2
Give a reason for the last step in the argument shown.

Answer 1

GivEn - 3(x+4)=18

• (when we expand it using Distributive property) - 3x+12=18

• (and when we change the side of 12 and subtract it from 18 , it becomes) - 3x=6

• and then we have to change the side of 3 and bring it to RHS and as it is multiplied with x in the the LHS ,in RHS it will be divided with 6 in RHS ,thus it will form the equation = x=6/3 ,which when simplified becomes ,2 . Thus , our answer is 2.