Question

Help! 18 points!

Answer 1

C. is the answer bc 3+3x3 is 3 + 9= 12
and -4x3 + 3x3 which is -12 + 9= -3

Answer 2

solve x+3y=12 for x

Add -3y to both sides

x+3y+-3y= 12+-3y

x= -3y+12

Substitute -3y+12 for x in -4x+3y= -3

-4x+3y = -3

-4(-3y+12)= + 3y = -3

Simplify both sides of the equation

15y-48= -3

Add 48 to both sides

15y-48+48= -3+48

15y = 45

Divide both sides by 15

15y/15 = 45/15

y= 3

Substitute 3 for y in x = -3y+12

x = -3y+12

x= (-3)(3)+12

 Simplify both sides of the equation

x= 3

Answer : x= 3 and y= 3

                (3,3)

                C is the answer

I hope that's help !