Question

помогите плз,всё решить​

Answer 1

$1. : 3x + 5 = 8x - 15 \ 8x - 3x = 15 + 5 \ 5x = 20 \ x = 4 \ 2. : 3x + 16 = 8x - 9 \ 8x - 3x = 16 + 9 \ 5x = 25 \ x = 5$

$3. : 4 + 25y = 6 + 24y \ 25y - 24y = 6 - 4 \ y = 2 \ 4. : 4(x - 3) - 16 = 5(x - 5) \ 4x - 12 - 16 = 5x - 25 \ 5x - 4x = 25 - 12 - 16 \ x = - 3$

$5. : 5x + 27 = 4x + 21 \ 5x - 4x = 21 - 27 : \ x = - 6$

$6. : 4(3 - 2y) - 42 = 2(3 + 2y) \ 12 - 8y - 42 = 6 + 4y \ 12 - 42 - 6 = 4y + 8y \ 12y = - 36 \ y = - 3$

$7. : 3(4x - 8) = 3x - 6 \ 12x - 24 = 3x - 6 \ 12x - 3x = - 6 + 24 \ 9x = 18 = \ x = 2$

$8. : 1 - 5(1.5 + x) = 6 - 7.5x \ 1 - 7.5 - 5x = 6 - 7.5x \ 7.5x - 5x = 6 - 1 + 7.5 \ 2.5x = 12.5 \ x = 5$

$9. : 3(5 - x) + 13 = 4(3x - 8) \ 15 - 3x + 13 = 12x - 32 \ 12x + 3x = 32 + 15 + 13 \ 15x = 60 \ x = 4$

Answer 2

спасибо большое ♡