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Q equals 100 Q/5=20 Multiply by 5 on each side 5(Q/5)=20 Q=100
5q - 3.75 = 26.25 Therefore, 5q = 30 q = 30/5 q = 6
28
Suppose the value of whatever it is, is P in the first year and Q in the next. Then the percentage change is 100*(P - Q)/Q or, equivalently, 100*(P/Q - 1)
P + Q = 180 P = 4Q + 30 So (4Q + 30) + Q = 180 ie 5Q = 150 or Q = 30 Then P = 4Q + 30 = 150