Question

Виконайте дії: 21 + *-1 ' x-5 X- А) 1 У відповідь записати букву Введіть відповідь: Б) Введіть відповідь... x+7 x-1' B) x-9 x-1 Г) x+9 2(x-1)

Answer 1

A) 1 To solve this expression, we simplify it step by step. First, we combine the like terms. For the expression x-5+x, we can simplify it to 2x-5. So, the expression becomes 21*-1+2x-5.

Next, we multiply 21 and -1, which gives us -21. The expression now becomes -21+2x-5.

Finally, we combine the like terms again. -21 and -5 can be simplified to -26. The expression is now 2x-26. Therefore, the answer is B) 2x-26.

B) 1 To solve this expression, we simplify it step by step. First, we combine the like terms. For the expression x+7+x-1, we can simplify it to 2x+6. So, the expression becomes x-9+2x+6.

Next, we combine the like terms again. x and 2x can be simplified to 3x. The expression now becomes 3x-9+6.

Finally, we combine the numbers -9 and 6, which gives us -3. The expression is now 3x-3. Therefore, the answer is A) 3x-3.

C) 1 To solve this expression, we simplify it step by step. First, we apply the distributive property of multiplication. We multiply 2 with each term inside the parentheses. So, the expression becomes x+9+2x-2.

Next, we combine the like terms. x and 2x can be simplified to 3x. The expression now becomes 3x+9-2.

Finally, we combine the numbers 9 and -2, which gives us 7. The expression is now 3x+7. Therefore, the answer is C) 3x+7.