Question

Решите способом сложения
6p-2c=4
3p+2c=6

Answer 1

6p-2c=4
3p+2c=6
_______

9р=10
р=$frac{10}{9}$
р=$1frac{1}{9}$

Answer 2

6p-2c=4
3p+2c=6
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9p=10
p=10/9

=> 3p+2c=6
3(10/9) +2c=6
2c =1.8
c=0.9