解方程(S-80)/80=(s+50)/(2s-50)还有这个(X-52)/52=(X+44)/(2X-44)

Question

解方程(S-80)/80=(s+50)/(2s-50)
还有这个
(X-52)/52=(X+44)/(2X-44)

Answer 1

（S - 80）/80 = (S + 50)/(2S - 50)
(S - 80)(2S - 50) = 80(S + 50)
2S2 - 160S - 50S + 4000 = 80S + 4000
2S2 - 290S = 0
S(S-145) = 0
S = 0 或 S = 145
(X-52)/52=(X+44)/(2X-44)
(X-52)(2X-44) = 52(X+44)
2X2 - 104X - 44X + 44x52 = 52X + 44x52
2X2 -200X = 0
X(X-100) = 0
X =0 或 X = 100