Question: The cost of 3 math journals and 6 science journals is $66 and the cost of 4 math journals and 1 science journal is $32. Find the cost of a math journal and a science journal graphically.
A ) $713, $6.4 B ) $6, $8 C ) $21, $45 D ) $17, $49
Steps to derive
1 Let $x be the cost of a math journal and $y be the cost of a science journal.
2 3x + 6y = 66 ------ (1) [Cost of 3 math journals and 6 science journals is $66 .]
3 4x + y = 32 ------ (2) [Cost of 4 math journals and 1 science journal is $32.]
