Question

СРОЧНО ОЧЕНЬ НУЖНО!!!!!!​

Answer 1

Объяснение:

3)

$x = 5 + y \\ 2(5 + y) = 7 \\ x = 5 + y \\ 10 + 2y = 7 \\ 2y = - 3 \\ y = - 1.5 \\ \\ x = 5 - 1.5 = 3.5$

4)

$8x = 16 \\ x = 2$

5)

$3x - 6 - x = 2 + 3 \\ 2x = 11 \\ x = 5.5$

4)