Solve the system by the substitution method.
x - 3y = -4
y = -3x + 8
select the correct choice below and fill in any answer boxes present in your choice.
a. the solution is (type an ordered pair.)
b. there are an infinitely many solutions.
c. there is no solution.

(2,2)

Step-by-step explanation:

Given equations

x-3y=-4(1)

y=-3x+8.(2)

Substitute 2 in 1. This means use the value of y in equation 1, to replace y

x-3(-3x+8)=-4open brackets

x+9x-24=-4collect like terms

10x=-4+24

10x=20divide by 10 both sides to get value of x

10x/10=20/10=2

x=2use value of x in equation (2) to get value of y

y=-3x+8

y=-3(2)+8

y=-6+8=2

solutions

x=2, y=2

$450 is the answer.

step-by-step explanation:

30% of 450 = 135

450-135=315