Question

Solve. 5. x + 6 + 2x = 15

Answer 1

x + 6 + 2x = 15

x+2x+6= 15 ( combine like terms)

3x+6= 15

move +6 to the other side

sign changes from +6 to -6

3x+6-6= 15-6

3x= 15-6

3x= 9

divide both sides by 3 to get x by itself

3x/3= 9/3

Cross out 3 and 3 , divide by 3 and then becomes 1*1*x= x

x= 9/3

Answer: x= 3