Question

Ayuda por favor vale nota le doy cinco estrellas

Answer 1

Respuesta:

1.

$x = \frac{5 - 2y}{5} \\ 3( \frac{5 - 2y}{5} )+ y = 4 \\ \frac{15 - 6y}{15} + y = 4 \\ 15 - 6y + 15y = 60 \\ + 9y = 60 - 15 \\ 9y = + 45 \\ y = 5$

2.

$s = \frac{19 - 3t}{5} \\ - 2( \frac{19 - 3t}{5} ) + t = - 12 \\ \frac{ - 38 + 6t}{ - 10} + t = - 12 \\ - 38 + 6t + 10t = - 120 \\ + 16t = - 120 + 38 \\ 16t = - 82$

3.

$x = \frac{0 + 3y}{2} \\ 3( \frac{0 + 3y}{2} ) + y = 22 \\ \frac{0 + 9y}{6} + y= 22 \\ 0 + 9y + 6y = + 132 \\ 15y = 132 \\ y = \frac{132}{15}$

4.

$x = \frac{ - 9 + 3y}{4} \\ ( \frac{ - 9 + 3y}{4} ) - y = - 3 \\ - 9 + 3y - 4y = - 12 \\ - y = - 12 + 9 \\ - y = - 3 \\ y = 3$

5.

$- 3x - y = 9 \\ 8x + 5y = + 1 \\ x = \frac{1 - 5y}{8} \\ - 3( \frac{1 - 5y}{8} ) + 5y = + 1 \\ \frac{ - 3 + 15y}{ - 24} + 5y = 1 \\ - 3 + 15y - 120y = - 24 \\ - 105y = - 24 + 3 \\ - 105y = - 21 \\ y = \frac{1}{2}$