Question

c+2d =4 , 2c-d=-1 solve by simultaneous equations​

Answer 1

Answer:

$c = \frac{2}{5} and \: d \: = \frac{9}{5}$

Step-by-step explanation:

$c \: = 4 - 2d \\ 2(4 - 2d) - d \: = - 1 \\ 8 - 4d - d \: = - 1 \\ 8 - 5d = - 1 \\ - 5d \: = - 1 - 8 \\ - 5d \: = - 9 \\ d = \frac{9}{5} \\ c \: = 4 - ( \frac{2 \times 9}{5} ) \\ c = \frac{2}{5}$

Answered by Gauthmath