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What is the value of x?
(3x)
(x + 40)
020
W
0 35
O 60
70

it is hard to answer this question because it is not in line, but if I understand corectly then the answer is 20

Step-by-step explanation:

3x=x+40

3x-x=40

2x=40 /:2

x=20

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

12r - 8 - 12

you have to combine like terms. below i have bolded the like terms:

12r - 8 - 12

together it combines to:

12r - 20

hope this !