Jenny purchased 26 magazines for her project research at a total cost of 134$. The art related magazines cost4$ each, while the science related magazines cost 7$ each. Find the number of art related magazines and science related magazines purchased

Assume that

Art magazine = A

Science magazine = S

A + S = 26

4A + 7S = 134

Use either substitution method or elimination to solve.

personally i would solve using substitution

in the 1st equation isolate A

A = - S + 26

and then substitute the value of A in the 2nd equation

4 (-S + 26) + 7S = 134

-4S + 104 + 7S = 134

3S + 104 = 134

3S = 30

S = 10

Now find A

A + S = 26

A + 10 = 26

A = 16

Therefore we would have

10 Science magazines and 16 Arts.