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rodikova [14]
3 years ago
11

MULTIPLE CHOICE What is LM? 3x + 5 4x + 7 LN = 33 cm

Mathematics
1 answer:
FromTheMoon [43]3 years ago
7 0

Answer:

C. 14

Step-by-step explanation:

Add LM and MN

(3x + 5) + (4x + 7)

(4x + 3x) + (5 + 7)

7x + 12

As we know the total is 33

So,

7x + 12 = 33

Subtract 12 from 33, which gives me 21

Now,

7x = 21

To make x alone, divide both sides by 7, and then we will get x = 3

If x = 3

LM = 3x + 5

= (3*3) + 5

= 9 + 5

= 14

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