You would use the distributive property with the negative. So the second x becomes negative, but since the 7 is already negative it becomes positive. Think of it as if you put the two dashes together you can make a plus sign.
Slope can be found but putting the equation in slope intercept form (y=mx+b)
6y=3x-12
y= 0.5x-2
M is your slope, b is the y intercept.
So the slope is 1/2, yintercept is (0,-2)
Hope this helps
Answer is 14
Step by step explanation
The amount is same so
64+8w=92+6w
2w=92-64=28
w=14 => after 14 weeks
She practices 5 hours a day.
120/4 = 30 hours per week.
30/6 = 5 hours per day.
