Question

21•(-x+y-z)решение без скобок​

Answer 1

Ответ:

Пошаговое объяснение:

$21(-x+y-z)=-21x+21y-21z$

Answer 2

Ответ:

21•(-x+y-z)=(-21x)+21y-21z=21y-21x-21z

Answer 3

To solve the expression 21•(-x+y-z) without parentheses, you can apply the distributive property of multiplication over addition and subtraction. This property states that when you multiply a number by a sum or difference, you can distribute the multiplication across each term inside the parentheses. Here's the step-by-step solution:

1. Distribute the 21 across the terms inside the parentheses: 21 • (-x + y - z) = 21 • -x + 21 • y + 21 • -z

2. Simplify each term: = -21x + 21y - 21z

So the solution without parentheses is -21x + 21y - 21z.