Answer:
2
Step-by-step explanation:
Commutative property of addition is being used.
This means that you can switch around where the numbers are and still get the same answer.
Hope this helps!
Answer:
3*(5*x-7)-(15*x-21)=0
Step-by-step explanation:
3 • (5x - 7) - (15x - 21) = 0
Step 2 :
Equation at the end of step 2 :
0 = 0
Step 3 :
Equations which are always true :
