Hi
After spending $3850 for tables and $1750 for chairs, a convention center
manager finds that 30% of his original budget remains.
Let x represent the original amount of the budget
Question states*** 30% left, then 70% has been spent
$3850 + $1750 = .70x
$5600/.70 = x
x = $8000, the original amount of the budget
.30*$8000 = $2400, the amount that remains.