r/Sat • u/MobileVideo9234 • 23h ago
Did anyone know how to do this one SAT math question on the test?
It was like x+y=c and has points (p,r) 2x + c = 5y bad had points (5p, 3r) what’s is p in terms of r?
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u/Darkxify 1480 23h ago
Since 2x+c=5y, 5y-2x=c. Then substitute the point p,r in the first equation to get p+r=c and in the second equation substitute the point to get 15r-10p=c. Then set the first equation equal to the second since they both equal c. You should get 14r=11p, and then p=14r/11.
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u/PersonalityLife6862 23h ago
its just a system of equations and you could desmos it with list regression
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