The answer to this question is metaphor
5+3x=23 x=6 the answer is 6
Suppose he invest x dollars in one account, y in the other
x+y=12,500
0.042x+0.062y=669.50
multiple the first equation by 0.042: 0.042x+0.042y=525
subtract this new equation from equation 2: 0.02y=144.50
y=7225
x=12500-7225=5275
Its radical 49 :) (by radical 7 means square root of 7)
Answer:
both elements will be negative in rot.180°
