В теории ,вроде, должно выглядеть так
a+b=c
c-a=b
c-b=a
1.
1) A dog can`t dance.
2) A cat can`t sing.
3) A frog can jump.
4) A horse can run.
5) A bird can fly.
7) A fish can swim.
2.
1) I can read.
2) My sister can`t sing.
3) My mummy can swim. My mummy can`t fly.
4) My daddy can`t dance.
5) My brother can climb.
6) My grandmather can run.
7) My grandfather can swing. My grandfather can`t sing.
1/ ЕҮОБ(аб)ЕҮОБ(2*2*3*5,2*3*3)ЕҮОБ2=2*3=6
ЕҮОБ=6
2(3a - 2b) -2(b + 2a - 3) + 4(0,5a - b)=6а-4b-2b-4a+6+2a-4b=4a-10b+6