Identify the solution set of the inequality using the given replacement set.

x < –7; {–15, –10.5, –7.2, –7, 0, 6}

a.
{–15, –10.5, –7.2, –7}

b.
{–15, –10.5, –7.2}

c.
{–15, –10.5, 0, 6}

d.
{0, 6}

true

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