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Ilya [14]
2 years ago
11

13. If r + 9 = 42, does r +9-9=42 +9? Why or why not?

Mathematics
1 answer:
Vladimir79 [104]2 years ago
3 0

Answer:

no

Step-by-step explanation:

if u subtract negative nine from one side of the equation, in order to keep both sides of the equation equal, you must subtract 9 from the other side. moreover, if you subtract nine from one side and add 9 to the other, there will be a 9+9=18 difference in values of both sides

brainliest pls thanks

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Answer:

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Step-by-step explanation:

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the total amount of money Justin has = Amount Justin has in the bank + (Amount Justin earns per week * number of weeks)

y = 25 + (40 * x)

y = 25 + 40x

The equation is

y = 25 + 40x

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