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153=7(2+7k)-8
We move all terms to the left:
153-(7(2+7k)-8)=0
We add all the numbers together, and all the variables
-(7(7k+2)-8)+153=0
We calculate terms in parentheses: -(7(7k+2)-8), so:We get rid of parentheses
7(7k+2)-8
We multiply parentheses
49k+14-8
We add all the numbers together, and all the variables
49k+6
Back to the equation:
-(49k+6)
-49k-6+153=0
We add all the numbers together, and all the variables
-49k+147=0
We move all terms containing k to the left, all other terms to the right
-49k=-147
k=-147/-49
k=+3
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