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Irina-Kira [14]
3 years ago
9

Find the value of x and y

Mathematics
1 answer:
Zolol [24]3 years ago
7 0
2x=9-y
3y=x-8

y=9-2x
3(9-2x)=x-8

27-6x=x-8
35=7x
x=5

2*5=9-y
10=9-y
y-1
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3 years ago
Read 2 more answers
Make b the subject of the formula P=2a+b
Gelneren [198K]
In order to make b the subject of this equation, we must isolate it on the left side. We can do this by following these steps:

P = 2a+b

Subtract b from both sides

P - b = 2a+b-b

P-b=2a

Subtract P from both sides

P-b-P=2a-P

-b=2a-P

Now, we have isolated b, but it is negative. We can fix this by multiplying both sides of the equation by -1.

-(-b)=-(2a-P)

b=-2a+P

Which is your final answer.
b = -2a+P.
Hope that helped! =)
5 0
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Read 2 more answers
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