Let's solve this system thru the elimination method:
<span>-6x-3y=3 Mult. all terms by -1 to obtain 6x+3y = -3 -6x+7y=-7 Add your result to the second equation:
</span> 6x+3y = -3 -6x+7y=-7 ---------------- 10y = -10, and so y = -1. Subst. -1 for y in the first equation and then solve the result for x. You'll find that x = 0.
She spends 1/4 of her day at school, this would be 8 hours out of 24 hours. which would be 8/24=1/4. therefore she spends 14 hours with her friends (3/4)
