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Solve the problem by applying system of linear equations in two variables. Use substitution method

Marcus bought a total of 15 heart shape eraser and sharpener worth Php 100. A heart shape eraser costs Php 6 each while a sharpener costs Php 8 each. How many sharpeners did she buy?
Let x be the number of eraser, and y be the number of sharpener.




(Please answer correctly T^T)