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wariber [46]
2 years ago
7

Help me I need the answer on paper help me now

Mathematics
1 answer:
Viktor [21]2 years ago
3 0

Answer:

a) k = 10              b) k = 7.5

Step-by-step explanation:

<h3><u><em>a)</em></u></h3>

( 5k+ 20 ) + ( 7k + 40 ) = 180

12k + 60 = 180

12k = 120

k = 10

<h3><u><em>b)</em></u></h3>

40 + ( 12k + 10) + 180 - ( 8k + 80 ) = 180

50 + 12k + 180 - 8k - 80 = 180

50 + 12k -8k - 80 = 0

50 + 4k - 80 = 0

30 = 4k

k = 7.5

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