20 Read and write the differences. (See Student's Book page 72.) 1 Some artists paint with oils.
Some artists paint with water colours
2 Some paintings are realistic.
3 Some paintings are light.
4 Some paintings are very big

Question

Другие предметы: 20 Read and write the differences. (See Student s Book page 72.) 1 Some artists paint with oils. Some artists paint with water colours 2 Some paintings are realistic. 3 Some paintings are light. 4 Some paintings are very big

Arina200444 · Accepted Answer

№38,13 а) х/2 + у/3 =3             (3х+2у)/6=18/6      3х+2у=18 | *(-2)      х/3  + у/2 =1/3          (2х+3у)/6=2/6        2х+3у=2  | *3 -6x-4y=-36  6x+9y=6 Складываем уравнения: 5у=-30 у=-6 6х+9*(-6)=6 6х-54=6 6х=60 х=10 ответ: х=10    у=-6. б) х/3 +у/2 =5    (2х+3у)/6 =30/6     2х+3у=30 | *(-5)    5х-11у=1        5х-11у=1              5х-11у=1  | *2 -10x-15y=-150  10x-22y=2 Складываем уравнения: -37у=-148  у=4 5х-11*4=1 5х-44=1 5х=45 х=9 ответ: х=9   у=4. в) х/3 - у/2 =-4      (2х-3у)/6=-24/6...

20 Read and write the differences. (See Student's Book page 72.) 1 Some artists paint with oils.Some artists paint with water colours2 Some paintings are realistic.3 Some paintings are light.4 Some paintings are very big

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20 Read and write the differences. (See Student's Book page 72.) 1 Some artists paint with oils.
Some artists paint with water colours
2 Some paintings are realistic.
3 Some paintings are light.
4 Some paintings are very big