Sharon is working her way through school she works two part time jobs for 37 hours a week job a pays $5.70 per hour and job b pays $7.00 per hour how many hours did she work if she made $236.90
x- hours for job A y- hours for job B x+y=37 |*7 7x+ 7y= 259 x*5,7 +y*7=236,90 ----------------------------- 7x-5,7 x+7y-7y=259-236,9 1,3x=22,1 x=22,1:1,3 x=17 hour for job A y=37-17=20 hours for job B
