Question

2x+ 3y 8
4x - y = 2 en método de sustitución

Answer 1

Respuesta:

$4x - y = 2 \\ 4x = 2 + y \\ x = \frac{2 + y}{4} \\ \\ 2x + 3y = 8 \\ 2 \times \frac{2 + y}{4} + 3y = 8 \\ \frac{4 + 2y}{4} + \frac{12y}{4} = 8 \\ \frac{4 + 2y + 12y}{4} = 8 \\ \frac{4 + 14y}{4} = 8 \\ 4 + 14y = 32 \\ 14y = 32 - 4 \\ 14y = 28 \\ y = \frac{28}{14} = 2 \\ y = 2$

2*1+3*2=2+6=8

4*1-2=4-2=2