Question

Помогите! Даю 50 Баллов. 69 : (2 * y - 1) = 21 : 3 И 748 - (b+248) = 300.

Answer 1

1)
69 : (2y - 1) = 7

2y - 1 = 69 : 7

2y - 1 = 69/7

2y = 76/7

y = 38/7

2) 
b+248 = 748 - 300

b + 248 = 448

b = 448 - 248

b = 200

Answer 2

Спасибо!