Asked by kylie

Look at the system of equations below. If you were to substitute the first equation into the second, what would the result look like?

y = 2x - 4
x - 3y = 7

a).2x - 4 - 3y = 7
b).x - 3(2x - 4) = 7
c).x - 2x - 4 = 7
d).x - 7 = 2x - 4
I really need help with this question, I don't understand it. PLEASE HELP!

Answers

Answered by bobpursley
x - 3y = 7 but y = 2x - 4 so
x-3(2x-4)=7 which is exactly one of the answers.
Answered by kylie
thank you so soooo much, i apreciate the help (:
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