Question

(740+X)/(1455+X)=55%,怎么求X,需要计算步骤

Answer 1

(740+X)/(1455+X)=55%,

740+X=0.55(1455+X)

740+X=800.25+0.55X

X-0.55X=800.25-740

0.45X=60.25

X=60.25÷0.45

X=133+8/9

X=133又9分之8