The answer is C: (3,3)
x+3y=12;−4x+3y=−3Step: Solve
x+3y=12for x:
x+3y+−3y=12+−3y(Add -3y to both sides)
x=−3y+12Step: Substitute
−3y+12forxin
−4x+3y=−3:−4x+3y=−3−4(−3y+12)+3y=−315y−48=−3(Simplify both sides of the equation)
15y−48+48=−3+48(Add 48 to both sides)
15y=4515y15=4515(Divide both sides by 15)
y=3Step: Substitute3foryin
x=−3y+12:x=−3y+12x=(−3)(3)+12x=3(Simplify both sides of the equation)
Hope this helps!
