kahmir15
15.01.2021 •
Mathematics
A plane has 4 middle seats, 3 right seats, and 3 left-hand seats in each row. If there are 360 seat total on the plane, how many middle seats are there on the plane?
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Ответ:
x = 6
Step-by-step explanation:
let second number be - x
let the onr number be - 2x + 6
x + 2x + 6 = 42
3x + 6 = 42
3x = 42 -6
3x = 36
x = 36/6
x = 6