DF =DE + EF
4x-8 = x-4 + 2x+5
4x - 8 = 3x + 1
4x - 3x = 1 + 8
x = 9
There are three unknowns in this problem. First, let's assign variables for these unknowns.
Let
x be the amount received by the first friend
y be the amount received by the second friend
z be the amount received by the third friend
Next, we formulate equations for the relationships
x = 4z
z = 4y
x + y + z = <span>$231,000
Solving simultaneously,
4(4y) + y + 4y = </span><span>$231,000
21y = </span><span>$231,000
y = $11,000
z = 4($11,000) = $44,000
x = 4($44,000) = $176,000</span>
500 liters is the answer..............
70=3x+10
Subtract 10 from both sides
60=3x
Divide both sides by 3
20=x
x=20
