Bricklayers

8 bricklayers build a house for 630 days. How many bricklayers have to add after 150 days, so then the whole building completed in (next) 320 days?

Result

n =  4

Solution:


150/630+(n+8)*320/(630*8)=1

40n = 160

n = 4

Calculated by our simple equation calculator.








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