Question

7(5 – y) + 3(y - 7) 4(3a – c) - (5a – 2c) 4 + x - (2x + (x – 3)).СРОЧНО!!!!!!!!!!!!!!!!!!!!!

Answer 1

7(5-y)+3(y-7)=35-7y+3y-21=14-4y
4(3a-c)-(5a-2c)=12a-4c-5a+2c=7a-2c
4+x-(2x+(x-3))=4+x-2x-x+3=7-2x

Answer 2

Let's simplify each expression step by step:

1. 7(5 – y) + 3(y - 7)

Distribute the 7 and 3:

= 35 - 7y + 3y - 21

Combine like terms:

= -4y + 14

Therefore, 7(5 – y) + 3(y - 7) simplifies to -4y + 14.

2. 4(3a – c) - (5a – 2c)

Distribute the 4 and the negative sign in front of the parentheses:

= 12a - 4c - 5a + 2c

Combine like terms:

= 7a - 2c

Therefore, 4(3a – c) - (5a – 2c) simplifies to 7a - 2c.

3. 4 + x - (2x + (x – 3))

Simplify the expression inside the parentheses first:

= 4 + x - (2x + x - 3)

Remove the parentheses by distributing the negative sign:

= 4 + x - 2x - x + 3

Combine like terms:

= 5 - x

Therefore, 4 + x - (2x + (x – 3)) simplifies to 5 - x.

Final simplified expressions:

• 7(5 – y) + 3(y - 7) simplifies to -4y + 14.
• 4(3a – c) - (5a – 2c) simplifies to 7a - 2c.
• 4 + x - (2x + (x – 3)) simplifies to 5 - x.