Question

В) 21 · (4 – 6y) = y – 42;

Answer 1

Ответ:

1

Пошаговое объяснение:

21 · (4 – 6y) = y – 42

84 - 126y = y – 42;

84 - 126y - y + 42=0;

126 - 126y=0

y=1

Answer 2

To solve the equation 21 · (4 – 6y) = y – 42, we will follow the steps below:

1. Distribute the 21 to the terms inside the parentheses: 21 · 4 – 21 · 6y = y – 42

Simplifying this expression: 84 - 126y = y - 42

2. Move all the terms with y to one side of the equation and the constant terms to the other side: -126y - y = 42 - 84

Simplifying further: -127y = -42 - 84 -127y = -126

3. Divide both sides of the equation by -127 to solve for y: y = -126 / -127

Simplifying the fraction, we get: y = 126 / 127

Therefore, the solution to the equation is: y = 126 / 127