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devlian [24]
4 years ago
8

Given that R=9x+8y find x when y=8 and R=4

Mathematics
2 answers:
Ilya [14]4 years ago
8 0

Answer:

Step-by-step explanation:

R = 9x + 8y

4 = 9x + 8*8

4 = 9x + 64

Subtract 64 from both sides

4 - 64 = 9x + 64 - 64

-60 = 9x

Divide both sides by 9

-60/9 = 9x/9

-20/3 = x

x = -6 2/3

mojhsa [17]4 years ago
6 0

Answer:

-\frac{20}{3}

Step-by-step explanation:

R=9x+8y

y=8 and R=4

4= 9x + 8.8

4 = 9x + 64

4 - 64 = 9x

-60 = 9x

-60 / 9 = x

-20/3 = x

Hope this helps ^-^

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