Mathematics Test—No Calculator - SAT Suite of Assessments

equals 50. She earned a total of 1,950 points, so it must also be true that 30 x. plus 60 y. equals 1,950. Dividing both sides of this equation by 30 gives . x. plus 2 y. equals 65. Subtracting the first equation, x. plus . y. equals 50, from the second equation, x plus 2 y. equals 65, gives . y. equals 15. Therefore, Tina solved 15 hard puzzles. ................
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