Math, asked by abis63682, 9 months ago

2a-(8a+1)-(a+1)*5=9 then a=?​

Answers

Answered by aariyasarvaiya
0

Answer:

Mark me brainilest

Step-by-step explanation:

Simplifying

2a + -1(8a + 1) + -1(a + 2) * 0.5 = 9

Reorder the terms:

2a + -1(1 + 8a) + -1(a + 2) * 0.5 = 9

2a + (1 * -1 + 8a * -1) + -1(a + 2) * 0.5 = 9

2a + (-1 + -8a) + -1(a + 2) * 0.5 = 9

Reorder the terms:

2a + -1 + -8a + -1(2 + a) * 0.5 = 9

Reorder the terms for easier multiplication:

2a + -1 + -8a + -1 * 0.5(2 + a) = 9

Multiply -1 * 0.5

2a + -1 + -8a + -0.5(2 + a) = 9

2a + -1 + -8a + (2 * -0.5 + a * -0.5) = 9

2a + -1 + -8a + (-1 + -0.5a) = 9

Reorder the terms:

-1 + -1 + 2a + -8a + -0.5a = 9

Combine like terms: -1 + -1 = -2

-2 + 2a + -8a + -0.5a = 9

Combine like terms: 2a + -8a = -6a

-2 + -6a + -0.5a = 9

Combine like terms: -6a + -0.5a = -6.5a

-2 + -6.5a = 9

Solving

-2 + -6.5a = 9

Solving for variable 'a'.

Move all terms containing a to the left, all other terms to the right.

Add '2' to each side of the equation.

-2 + 2 + -6.5a = 9 + 2

Combine like terms: -2 + 2 = 0

0 + -6.5a = 9 + 2

-6.5a = 9 + 2

Combine like terms: 9 + 2 = 11

-6.5a = 11

Divide each side by '-6.5'.

a = -1.692307692

Simplifying

a = -1.692307692

Answered by geetu2k5
0

Answer:

a=15/11

Step-by-step explanation:

2a-(8a+1)-(a+1)*5=9

2a-8a-1-(5a+5)=9

-6a-1-5a-5=9

-11a-6=9

-11a=6+9

11a=15

a=15/11

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