Mathematics
joe2
5

1) 6x+7y=-9 -4x-5y=5

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(2) Answers
armmermom2x

-5y=4x+5 y=-4/5(x)-1 6x+7y=-9 6x+7(-4x/5-1)=-9 6x-28x/5-7=-9 2/5(x)=-2 multiply both sides by 5 2x=-10 x=-5 6x+7y=-9 -30+7y=-9 7y=21 Y=3

Jaywise

[latex]\begin{cases} 6x+7y=-9 \\ -4x-5y=5 \end{cases}\\ \\\begin{cases} 6x =-7y-9 /:6\\ -4x-5y=5 \end{cases}\\ \\\begin{cases} x =-\frac{7}{6}y-\frac{9}{6}\\ -4x-5y=5 \end{cases}\\ \\\begin{cases} x =-\frac{7}{6}y-\frac{3}{2}\\ -4*(-\frac{7}{6}y-\frac{3}{2})-5y=5 \end{cases}[/latex] [latex]\begin{cases} x =-\frac{7}{6}y-\frac{3}{2}\\ \frac{14}{3}y+6-5y=5 \end{cases} \\ \\\begin{cases} x =-\frac{7}{6}y-\frac{3}{2}\\ \frac{14}{3}y-\frac{15}{3}y=5-6 \end{cases} \\ \\\begin{cases} x =-\frac{7}{6}y-\frac{3}{2}\\ -\frac{1}{3}y=-1/(-3) \end{cases}[/latex] [latex]\begin{cases} x =-\frac{7}{6}*3-\frac{3}{2}\\ y=3 \end{cases} \\ \\\begin{cases} x =-\frac{7}{2}-\frac{3}{2}\\ y=3 \end{cases}\\ \\\begin{cases} x =-\frac{10}{2}\\ y=3 \end{cases} \\ \\\begin{cases} x =-5\\ y=3 \end{cases}[/latex]

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