Question

Solve: 2x - (7-5x) - 21 = 0

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Answer 1

Step-by-step explanation:

2x-(7-5x)-21=0

We add all the numbers together, and all the variables

2x-(-5x+7)-21=0

We get rid of parentheses

2x+5x-7-21=0

We add all the numbers together, and all the variables

7x-28=0

We move all terms containing x to the left, all other terms to the right

7x=28

x=28/7

x=4

Answer 2

Answer:

2x - ( 7 - 5x ) - 21 = 0

2x - 7 + 5x - 21 = 0

2x + 5x - 7 - 21 = 0

7x - 28 = 0

7x = 28

x = 28/7

x = 4