Answer:
12 months
Step-by-step explanation:
55x + 50 = 45x + 170
10x = 120
x = 12
Here is the equation:

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You need to get "x" by itself so minus 3 from each side

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Divide 8 by 2

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x=4
So each 4 is equivalent to 4
Lets check:

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So that means that Marcus practiced the piano for 4 hours and Donnel practiced for 7
Answer:
18x + 16
Step-by-step explanation:
2 x length + 2 x width = perimeter
2(5x + 2) + 2(4x + 6)
= 10x + 4 + 8x + 12
= 18x + 16
Tell Cory he needs to get the brainly app or
Tell Cory he needs to buy 72 boards
Accordingly the answer is Nineteen Fourths.