Which of the following is equivalent to 5x + 7 = 6y? А
5z+6 = 7
B
5z+6y = -7
C
5X- 6y =7
D
5x - y = -7

the correct answer is the second option

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

70

step-by-step explanation:

answer: its the third option.

step-by-step explanation:

i just took the test.