so I am in algebra 1 and I need help with A+B=C but it says solve for A and I wanted to see if you can show how to do it for more questions in the future

A = C-B

Step-by-step explanation:

A+B=C

Subtract B from each side

A+B-B=C-B

A = C-B

rectangle that is ther answer you

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