Consider the system of equations:

3x − 4y = 12
2x + 6y = 18

Choose all of the equations that could be used when solving this system by substitution.

x = 9 − 3y
y = 18 − 3x
y = 3x + 3
x =
4
3
y + 4

X = 3x + 3

And

X = 4/3y + 4

This is from usatestprep

$2,703.06

step-by-step explanation:

add: $2,687.44+ $2,613.09+$2,808.64= $8,109.17

divide by 3 because you added 3 numbers.

$8,109.17/3=

answer: $2,703.06

mxb67

step-by-step explanation: