X = 16
You set the equations equal and then solvep
4=5x-16 is your answer and when you take the 3x from the left side then you also have to take it from the 8x on the other side
Q = 87 + 40
Q = 127
X + 127 + 38 = 180
X = 180 - 127 - 38
X = 15
Therefore we say X is 15
Using the decay formula: Total = start value x (1 - rate)^time
Total = 23,840 x (1-0.04)^10
Total = 23,840 x (0.96)^10
Total = 15,849.61
Rounded to nearest whole number = 15,850
