Alocal florist charges $8 for a red rose and $10 for a white rose. he sold twice as many red roses as white roses for a total income of $8,554 for the day. how many roses did he sell all together?

You set up the equations first. R= red rose, w= white rose

r=2w
8r+10w=8,554

You substitute r with 2w in the second equation and begin to evaluate. You should get w=329. Since w=329, you substitute this into the first equation, thus r= 2(329) = 658. You add both together to figure out the total amount sold, 658+329=987.

Y=-2x-6 is the answer

Hope this ; )