谁帮我解英文数学题

题目

谁帮我解英文数学题
The number of beads in Box G was 6/17 times as many as the number of beads in Box C.Sally later took some beads from both boxes and gave them to Kelvin.The number of beads she took from Box G was 7/18 time s the number of beads she took from Box C.as a result ,she had 49 beads left in box C and 16 beads left in Box G.how many beads did Sally give to Kelvin?

答案

G盒子里的珠子是C盒子里的6/17,sally从两个盒子里拿出珠子给了kelvin,她从G里面拿出的珠子是C里面的7/18,结果,C里面还剩49个珠子,G里剩16个,问sally拿了多少珠子给kelvin.
设
G里有g个珠子,C里有c个珠子
sally从G里拿出x个珠子,从C里拿出y个珠子
则,
c*6/17 =g
y*7/18=x
x+16=g
y+49=c
解这个方程组便可得出
g=30
c=85
x=14
y=36
所以x+y=14+36=50