Latrell multiplied the second equation by -4
<em><u>Solution:</u></em>
<em><u>Given system of equations are:</u></em>
x + y = 28 ---------- eqn 1
0.25x + 0.5y = 9 ----------- eqn 2
Latrell used linear combination to solve the system of equations shown
He did so by multiplying the second equation by a certain number to eliminate the x-terms
So, to eliminate the x term from second equation, he should multiply by -4
Multiply second equation by -4
-4(0.25x + 0.5y = 9)
-x - 2y = -36 -------- eqn 3
Now he can add eqn 1 and eqn 3, and eliminate the x terms
Thus, Latrell multiplied the second equation by -4
