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sleet_krkn [62]
3 years ago
9

-(1+7x)-6(-7-x)=36 I don't understand how to do this.

Mathematics
2 answers:
Ahat [919]3 years ago
8 0

edit: nevermind i multiplied wrong, the other answer is right

melomori [17]3 years ago
7 0

Answer:

\boxed{ \bold{ \huge{ \boxed{ \sf{x = 5}}}}}

Step-by-step explanation:

\sf{ - (1 + 7x) - 6( - 7 - x) = 36}

Distribute ( - ) sign through the parentheses

Similarly, distribute -6 through the parentheses

\dashrightarrow{ \sf{ - 1 - 7x + 42 + 6x = 36}}

Collect like terms

\dashrightarrow \sf  - 7x + 6x - 1 + 42 = 36

\dashrightarrow \:  \sf \:  - x - 1 + 42 = 36

The negative and positive integers are always subtracted but possess the sign of the bigger integer

\dashrightarrow{ \sf{ - x + 41 = 36}}

Move 41 to right hand side and change it's sign

\dashrightarrow{\sf{- x = 36 - 41}}

\dashrightarrow \sf \:  - x =  - 5

Change the signs on both sides of the equation

\dashrightarrow \:  \sf{x = 5}

Hope I helped!

Best regards! :D

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