Question

X -(4x- 7) = 5 x- ( x+ 21

Answer 1

Answer:

x=4

Step-by-step explanation:

The question is

Find the value of x

we have

$x-(4x-7)=5x-(x+21)$

solve for x

Eliminate parenthesis both sides

Remember that

$(-1)(-1)=+1\\(-1)(+1)=-1$

$x-4x+7=5x-x-21$

Combine like terms

$-3x+7=4x-21$

Group terms that contain the same variable

$4x+3x=7+21\\7x=28\\x=4$