Respuesta :

PEMDAS
Parenthesis
Exponent
Multiplication
Division
Addition
Subtraction

4n-40=7(-2+2)
0

4n-40=7(0)

4n-40= 0
+40 +40

4n=40
40/4

N=10
Step 1. Simplify -2 + 2 to 0

[tex]4n-40=7*0[/tex]

Step 2. 
Simplify 7 * 0 to 0

[tex]4n-40=0[/tex]

Step 3. Add 40 to both sides

[tex]4n=40[/tex]

Step 4. 
Divide both sides by 4

[tex]n= \frac{40}{4} [/tex]

Step 5. 
Simplify [tex] \frac{40}{4} [/tex] to 10

[tex]n=10[/tex]

Done :) Hope this helps! :)