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6y=13.5

Step-by-step explanation:

just multiply 6 by 2.25

y =

Step-by-step explanation:

Given

6y = 2 ← change into an improper fraction

6y = ( multiply both sides by 4 to clear the fraction )

24y = 9 ( divide both sides by 24 )

y = =

angle addition postulate

2x=56

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