The average aſ a list of 4mmxs is 91.0. A nex lix of 4 numbers has the same first numbers us the
original list, but the fourth number in the
original list
is XI, and the fourth number in the new list is 6. What
is lhe average of this new list of number?

answer: i'm great at algebra

~coco

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

∠cbe and ∠deb are same-side interior angles.

i took the test

x = -4

step-by-step explanation:

- 20 - 4(x + 3) = 4x

=> -20 - 4x - 12 = 4x

=> - 32 -4x = 4x

=> -32 = 4x + 4x

=> - 32 = 8x

=> -32/8 = x

=> -4 = x