Question

ПОЖАЛУЙСТА, ХОТЬ КТО НИБУДЬ! УПРОСТИТЕ: 1) 4,5х*(-20у)*2/3z= 2) n-(10+n)+(n+8)= 3) 7(3x-1)-4(9x+3)= и ещё просьба, люди добрые покажите как вы это делали не только ответ писать, пожалуйста!

Answer 1

1) 4.5x*(-20y)*2/3z=(4.5 это 45/10 а 45/15=3, сокращаем на 3 вместе с последней дробью, минус за скобку) = -1,5x*20y*2z =(15/10 и 2*10 сокращаем на 10 ) = -15*2*2x*y*z= -60xyz
2) n-(10+n)+(n+8) = n-10-n+n+8 = n-2 (ну а здесь то чего сложного было сделать? только и надо что "раскрыть скобки")
3) 7(3x-1) - 4(9x+3) = 21x - 7 - 36x - 3 = - 15x - 10

Answer 2

4,5х*(-20у)*2=-180ху
-180ху/3z = -60xy/z

n-(10+n)+(n+8) = n-10-n+n+8=n-2
7(3x-1)-4(9x+3)= 21x-7-36x-12=-15x-19

Answer 3

1) To simplify the expression 4.5x * (-20u) * 2 / 3z, we can follow the order of operations (PEMDAS/BODMAS).

First, we multiply 4.5x and -20u, resulting in -90xu.

Next, we multiply -90xu by 2, giving us -180xu.

Finally, we divide -180xu by 3z, which simplifies to -60xu/z.

2) To simplify the expression n - (10 + n) + (n + 8), we can start by simplifying the parentheses.

Inside the first set of parentheses, 10 + n simplifies to 10 + n.

Inside the second set of parentheses, n + 8 simplifies to n + 8.

Now, we can rewrite the expression as n - (10 + n) + (n + 8) = n - 10 - n + n + 8.

Next, we can combine like terms. The -n and +n terms cancel each other out, leaving us with n - 10 + 8.

Finally, we can simplify further by combining -10 and 8, resulting in n - 2.

3) To simplify the expression 7(3x - 1) - 4(9x + 3), we can start by simplifying the parentheses.

Inside the first set of parentheses, 3x - 1 remains as 3x - 1.

Inside the second set of parentheses, 9x + 3 remains as 9x + 3.

Now, we can rewrite the expression as 7(3x - 1) - 4(9x + 3) = 7 * 3x - 7 * 1 - 4 * 9x - 4 * 3.

Next, we can simplify further by multiplying.

7 * 3x simplifies to 21x.

7 * 1 simplifies to 7.

4 * 9x simplifies to 36x.

4 * 3 simplifies to 12.

Finally, we can combine like terms. 21x - 36x simplifies to -15x.

So, the simplified expression is -15x + 7 - 12, which further simplifies to -15x - 5.

I hope this helps! Let me know if you have any further questions.