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VARVARA [1.3K]
2 years ago
11

Please please help me i do not get this

Mathematics
2 answers:
7nadin3 [17]2 years ago
6 0

Answer:

x=16

Step-by-step explanation:

40x+55=695

subtract 55 from each side

40x=640

divide 640 by 40

x=16

Ipatiy [6.2K]2 years ago
3 0

Answer:

Explain

Step-by-step explanation:

I dont really know the inverse operation stuff but I do know you are solving for x

40x+55=695

40x=695-55

40x=640

X=640/40

X=16

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8x-5y=21 simultaneous linear equation<br>2x+9y=-5
olya-2409 [2.1K]

Answer:

x=2 and y=-1

Step-by-step explanation:

If two equations are given, we can solve one of the equation in terms of single variable and put it in the other equation which will further give the value of x and y.

For the given equations:

8x-5y=21              Equation:1

2x+9y=-5             Equation:2

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8x+36y=-20        Equation 3

Subtracting Equation:3 from Equation:1

8x-5y-(8x+36y)=21-(-20)\\8x-5y-8x-36y=21+20\\-41y=41\\y=-1

Putting value of 'y' in Equation:2 which will give the value of x

2x+9y=-5\\2x+9(-1)=-5\\2x-9=-5\\2x=4\\x=2

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