Answer:
0.8
Explanation:
10 /(x + 4) = 15 / 4(x + 1)
10 /(x + 4) = 15 / 4x + 4
Then, cross multiplication:
10*(4x + 4) = 15*(x + 4)
40x + 40 = 15x + 60
40x - 15x = 60 - 40
25x = 20
x = 0.8
Hope it helps. Thanks!
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