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Consider the following pair of equations:


y = x + 4

y = –2x – 2


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

Verified Answer :

Willchemistry

{  y = x + 4
    y = - 2 x - 2 

Subsititute  y = - 2 x - 2 :

[ (- 2 x - 2 ) = x + 4 ]

( - 2 x - 2 ) = x + 4

Add 2 to both sides:

- 2 x - 2 + 2 = x +  4 + 2

- 2 x  = x + 6 

Subtract x for 

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