1) Explain how you could use a number line to determine -5 -(-3). What is the difference? The number id diffrent
2) Explain how you could use a number line to determine the number that is 8
less than 3. What is the number?0
3) Explain how you can determine the sign of the sum of two integers if one
integer is positive and the other integer is negative.
Cick to add speaker notes

Here's link to the

cutt.ly/rzNrBcz

x = -3

y = -18

step-by-step explanation:

to solve by substitution, substitute one variable and solve for the other. then substitute again to find the remaining variable.

x-1/3(3x-9) = -3 since y=3x-9 substittute y.

x-1/3(3x-9)=-3

x + x +3 = -3

2x+3=-3

2x+3-3= -3-3

2x=-6

x=-3

substitute again into y=3x-9

y=3(-3)-9

y=-9-9

y=-18

the answer is simply just 6n add the two together as they have an n