пожалуйста помогите срочно ​

а. ((2(х + 1) + 10) ÷ 5 + 8) × 3 - 6 = 30

((2х + 2 + 10) ÷ 5 + 8) × 3 - 6 = 30

(0.4x + 2.4 + 8) × 3 - 6 = 30

1.2x + 31.2 = 36

1.2x = 4.8

x = 4.8 ÷ 1.2

x = 4

б. ((((5x + 7) ÷ 2 - 1) ÷ 2 + 25) ÷ 3 + 4) × 5 = 70

((2.5x + 3.5 - 1) ÷ 2 + 25) ÷ 3 + 4 = 70 ÷ 5

1.25x + 1.25 + 25 = (14 - 4) × 3

1.25x = 3.75

x = 3.75 ÷ 1.25

x = 3