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Alexeev081 [22]
2 years ago
13

(5x7) + (5x9) = 5x (7+?

Mathematics
2 answers:
Serjik [45]2 years ago
7 0

Answer:

9

Step-by-step explanation:

this is because it is 9 and it could be 9

pashok25 [27]2 years ago
3 0

Answer:

First let's find what (5x7) + (5x9) equals;

(5x7) + (5x9)

35 + 45

= <u>80</u>

Now 80 has to equal to;

5 x (7 + y) ( where 'y' is our unknown number)

So we set up the equation:-

80 = 5 x (7 + y)

80 = 35 + 5y

-35      -35

45 = 5y

/5    /5

9 = y

Let's double check:

80 = 5 x (7 + y)

80 = 5 x (7 + 9)

80 = 35 + 45

<em>80 = 80</em>, we are correct.

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