4x + 5x + 12 = -6 (given)
9x + 12 = -6 (simplify)
9x = -18 (subtraction)
x = -2 (addition)
Which reason is incorrect?
A) addition
B) given
C) simplify
D) subtraction
@Decarr432

Question

4x + 5x + 12 = -6 (given)
9x + 12 = -6 (simplify)
9x = -18 (subtraction)
x = -2 (addition)
  Which reason is incorrect?
A)	addition	
B)	given	
C)	simplify	
D)	subtraction
@Decarr432

heart_offire · Answer

D maybe

welshfella · Answer

how do you get from
9x = -18  to x = -2?

welshfella · Answer

x = -2 is wrong by the way

rebeccaxhawaii · Answer

nevermind when they say add it is not adding

decarr432 · Answer

is that all thats given in this problem?

welshfella · Answer

9x = -18
x = -18/9

heart_offire · Answer

by dividing

welshfella · Answer

right - and the reason given is addition

heart_offire · Answer

so what about the reason given for subtraction?

welshfella · Answer

thats correct because you subtract 12 from both sides

heart_offire · Answer

ok thanks

danjs · Answer

isnt addition and multiplication the main functions,    subtraction and division are still addition and multipl

danjs · Answer

add a negative     or multiply by  a fraction