Respuesta :
Hello there! :)
Answer:
1. B. 8. and x=8
*The answer must have a positive sign.*
2. D. Infinitely many.
3. D. -1 and y=-1
*The answer must have a negative sign.*
4. C. He didn't add 13 to 26.
5. B. 4 and y=4
*The answer must have a positive sign.*
Step-by-step explanation:
1. First, you divide by 5 from both sides of an equation.
[tex]\frac{5x}{5}=\frac{40}{5}[/tex]
Then, simplify.
[tex]40/5=8[/tex]
Answer: → [tex]\boxed{x=8}[/tex]
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2. 4x=4x both sides are equal and it's true.
Answer: [tex]\boxed{D.}[/tex]
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3. First, switch sides of an equation.
[tex]y+9=8[/tex]
Then, you subtract by 9 from both sides of an equation.
[tex]y+9-9=8-9[/tex]
Simplify and solve.
[tex]8-9=-1[/tex]
Answer: →[tex]\boxed{y=-1}[/tex]
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4. First, add by 13 from both sides of an equation.
[tex]x-13+13=26+13[/tex]
Then simplify and solve.
[tex]26+13=39[/tex]
Answer: [tex]\boxed{x=39}[/tex] and [tex]\boxed{C.}[/tex]
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5. First, subtract by 9 from both sides of an equation.
[tex]y+9-9=13-9[/tex]
Then simplify and solve.
[tex]13-9=4[/tex]
Answer: [tex]\boxed{y=4}[/tex]
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Hope this helps!
Thanks!
-Charlie
Have a great day!
:)