At the college are at 57 rooms 194 students. Some rooms are triple and some quad. How many triple and quadruple rooms there is, if it is all fully occupied?


x3 =  34
x4 =  23


57=x3+x4 194=3x3+4x4  x3=34 x4=2357 = x_3+x_4 \ \\ 194 = 3 x_3 +4 x_4 \ \\ \ \\ x_3=34 \ \\ x_4=23

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