Question

2y=21 6x6y 12.) 3x 4x - 4y=0 O 13-7x+4y=24XE VERE 14 Hy2y = -19 X-212.8 Byty24 Y24. - y Solve each system by elimination. *** 15) 8x-6y=-20 14) AX- 2 -24-2y-10 3 0-6 2120) YaZ enho 23 16) 6x-129=242 -16x + y = 30 16x -1240 - 16X-1294 30 by=-TB * 8%=-20467 -x-by=4 == 끓 bylo 6*-12-24 -62-36=24 6x+1231-12 CM-1224 -42-7=21 6224-12 bts-12k-36)-243247 t-shay-246 18) -24 - 8x= 12 y 7. 5 18

Answer 1

The given sets of equations are,

$\begin{gathered} 5y-4x-9=0\ldots\ldots(1) \\ 9y+11x+20=0\ldots\text{.}\mathrm{}(2) \end{gathered}$

Multiplying equation (1) by 11 and equation (2) by 4 and adding both the equations,

$\begin{gathered} 55y-44x-99+(36y+44x+80)=0 \\ 91y-19=0 \\ y=\frac{19}{91} \end{gathered}$

Substituting the value of y in equation (1),