Question

SOME! PLEASE HELP ME!!! I NEED HELP ASAP!! WILL GIVE MEDAL AND FAN!
Part 1: Decide whether you would use the graphing, substitution, or elimination method to solve the following system of equations. Explain, in complete sentences, why you chose that method.
Part 2: Solve the following system of equations and show all of your work.

5x + 3y = 8
y = −2x + 1

Answer 1

@thomaster @shkrina @robtobey @elisuzsmith @razor99 @terenzreignz @tshark14 @Tron_Cat @YourMentor @UsArmy3947 @iceicebaby @ivettef365

Answer 2

Substitution: It would be used because one equation is given as "y" alone with no coefficient so it would be easily substituted in the other equation.

Elimination: It would be used because "y" can be canceled out by multiplying the second equation by -3 and ordering the first equation correspondingly with the second and then u would find x and substitute its value in one of the equations.

Solution: y= - 2x + 1 --> -3y = + 6x - 3
5x+3y = 8 --> 3y = - 5x +8
Answer: (make a line) : 0 = x + 5 --> (x= - 5) and (y =11)

I'm a hundred % sure of this. I even substituted my results in the calculator and they were equal ;D
As simple as that!

Answer 3

But the bottom equation already has y isolated... no need to multiply any equation by anything, just sub that expression for y back into the first equation.

That would be my preferred method, but it is largely a matter of preference, either will work. :)

Answer 4

Sorry @kathy0514 I misread your answer.... thought you were saying that elimination should be used over the other 2... lol. Good explanation of the different methods!