Complete the factorisation of this expression by finding the values of the capitalised pronumerals.
12a+15b+9c=X(Aa+Bb+3c)
X=
A=
B=

X=3

A=4

B=5

Step-by-step explanation:

12a+15b+9c=

3*4*a+3*5*b+3*3*c=

3(4a+5b+3c) then

X=3

A=4

B=5

yes because there is exactly one y value for every x value

for function there can't be more than one value for every x value

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