12 systems using substitution2/10maldonathanan education center offers a total of 400 math, physics andchemistry courses. the ratio of the number of math courses tophysics courses to chemistry courses is 3: 4: 3. the cost of amath class is $25 per class and the cost of physics class is $20per class. it would cost $9.800 to take the 400 classes once. what's the price of each chemistry class? $ .00swa