M is between R and S.If RM=21, RS=15-3, And MS=9x +12, what is RS
Carol H.
answered • 12/12/17
Masters' Degree in Mathematics with 35 Years of Teaching Experience
RM + MS = RS
21 + 9x + 12 = 15x - 3
33 + 9x = 15x - 3
-6x = -36
x = 6
RS = 15(6) - 3
RS = 87
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