3/4-2/7
5/6-1/4
1 1/5-1/3
1 2/3-3/5

1. 3/4-2/7= 13/28

2. 5/6-1/4= 7/12

3. 1 1/5-1/3= 13/15

4.1 2/3-3/5= 16/15

Step-by-step explanation:

i am sorry it just submitted an answer but the answer is 365 boys. hopes this

step-by-step explanation:

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