Part 1: Explain, in complete sentences, how you would use the substitution method to solve the following system of equations. (3 points)

Part 2: Provide the solution to the system. (1 point)

5x – y = –1
7x – 3y = 13

Question

Part 1: Explain, in complete sentences, how you would use the substitution method to solve the following system of equations. (3 points)

Part 2: Provide the solution to the system. (1 point)

5x – y = –1 
7x – 3y = 13

earthcitizen · Answer

first i would make y the subject in eqn 1 and plug it into eqn 2 to find x. Then use x to find y

earthcitizen · Answer

y=5x+1...eqn 1
7x-3(5x+1) =13,
7x-15x-3=13 => x=-2

earthcitizen · Answer

$$\therefore y=5(-2)+1=-9$$

anonymous · Answer

this is from virtual school
 isn't it

earthcitizen · Answer

virtual school?

anonymous · Answer

yeah I'm taking algebra 1 online and its the exact same question and format that i had on the test

earthcitizen · Answer

how was the test ? did you make it ?

anonymous · Answer

no i didn't make it i took it though

earthcitizen · Answer

yh, did you pass it ?

anonymous · Answer

yeah... i think why does it matter

earthcitizen · Answer

never mind.Good job tho

anonymous · Answer

ok... i took it a while ago