# matn

posted by
**JR**
.

JUSTIFIES A STEP IN THE SOLUTION OF AN EQUATION

4n+(7+n)=52

4n+(n+7)=52

(4n+n)+7=52

5n+7=52

5n+7-7=52

5n=45

5n/5=45/9

n=9

posted by
**JR**
.

JUSTIFIES A STEP IN THE SOLUTION OF AN EQUATION

4n+(7+n)=52

4n+(n+7)=52

(4n+n)+7=52

5n+7=52

5n+7-7=52

5n=45

5n/5=45/9

n=9