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Crazy boy [7]
3 years ago
15

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

Mathematics
1 answer:
Solnce55 [7]3 years ago
6 0

Answer:

x=4

Step-by-step explanation:

<u><em>The question is</em></u>

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

<u><em /></u>

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