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1. 12 ÷ N x 123 = 369
2. N - 200 + 550 = 1350
3. 12 × 13 ÷ N = 39
4. N ÷ 5 × 15 + 322 - 366 = 1

what's the letter N? what's the solution?




Sagot :

Answer:

4

Step-by-step explanation:

In all these questions, you want to ask what is happening to N and in what order. Then do the opposite to both sides.

#1 first 12/N, then x 123

so must divide both sides by 123

12 / N x 123 / 123 = 369 / 123

12 / N = 3

*now you can just ask what number divides 12 and makes 3 = 4

or more complex

[tex]\frac{12}{N} = \frac{3}{1}[/tex] then cross multiply 12x1 = Nx3

12 = 3N

Then divide both sides by 3

12/3 = 3N/3

4 = N