y = 3x + 3
y = x − 1

Explain how you will solve the pair of equations by substitution. Show all the steps and write the solution in (x, y) form.

Question

y = 3x + 3 
y = x − 1

Explain how you will solve the pair of equations by substitution. Show all the steps and write the solution in (x, y) form.

anonymous · Answer

can you substitute the value of y from one equation in for y in the other equation?

anonymous · Answer

yes? i think so

anonymous · Answer

ok try it

anonymous · Answer

what do you get?

anonymous · Answer

y= y-1?

anonymous · Answer

it says y = 3x + 3  and y = x - 1,    so if y is equal to both of those things can you set those things equal to each other?

anonymous · Answer

yes because they are equal.. 
i think so, math is my worst:(

anonymous · Answer

its fine, so set them equal to each other, what do you get?

anonymous · Answer

y=3y+3??

anonymous · Answer

ok lets try a simpler problem, then come back to this one

anonymous · Answer

if y = 10

and y = x

then doesn't 10 = x

anonymous · Answer

yes

anonymous · Answer

ok so you have y = 3x + 3

and y = x - 1

so what is 3x + 3 equal to

3x + 3 = ?

anonymous · Answer

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