Question

84 - 7 -1x - 4{-17x + 3(8 - 9 +5x)}].​

Answer 1

Answer:

x= - 13.28

Step-by-step explanation:

84 - 7 -1x - 4{-17x + 3(8 - 9 +5x)}].

84 - 7 -1x - 4{-17x +24- 27 +15x}]

84 -7 -1x+ 68x-96+108- 60x

93+ 7x

7x=-93

x= -93/7

x= - 13.28

Answer 2

84 - 7 [-1x - 4{-17x + 3(8 - 9 +5x)}] = - 49x

Given:

84 - 7 [-1x - 4{-17x + 3(8 - 9 +5x)}]

To find:

Simplify  84 - 7 [-1x - 4{-17x + 3(8 - 9 +5x)}]

Solution:

"BODMAS" rule: is a method to solve an arithmetic problem

Here

B - First, simplify the brackets

O - Solve the exponent or orders

D - Perform division (from left to right)

M - Perform Multiplication

A - Do additions

S - Do subtractions

Given 84 - 7 [-1x - 4{-17x + 3(8 - 9 +5x)}]

To simplify the given problem use the "BODMAS" rule as shown below

First, solve from brackets

=> (8 - 9 +5x) = (-1 + 5x)

=> {-17x + 3(8 - 9 +5x)} =  {-17x + 3(-1+5x)} = {-17x - 3 +15x } = { -2x - 3}

=> [-1x - 4{-17x + 3(8 - 9 +5x)}] = [-1x - 4{ -2x - 3}] =  [-1x + 8x + 12}] = [7x +12]

From above calculations

[-1x - 4{-17x + 3(8 - 9 +5x)}] = [ 7x + 12 ]

Substitute the above value in the given problem

=> 84 - 7 [-1x - 4{-17x + 3(8 - 9 +5x)}]  = 84 - 7 [7x + 12]  

Now solve 84 - 7 [7x + 12]  

=  84 - 49x + 84      

= - 49x

Therefore,

84 - 7 [-1x - 4{-17x + 3(8 - 9 +5x)}] = - 49x

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