4-x=21/2

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Solution for 4-x=21/2 equation:



4-x=21/2
We move all terms to the left:
4-x-(21/2)=0
We add all the numbers together, and all the variables
-x+4-(+21/2)=0
We add all the numbers together, and all the variables
-1x+4-(+21/2)=0
We get rid of parentheses
-1x+4-21/2=0
We multiply all the terms by the denominator
-1x*2-21+4*2=0
We add all the numbers together, and all the variables
-1x*2-13=0
Wy multiply elements
-2x-13=0
We move all terms containing x to the left, all other terms to the right
-2x=13
x=13/-2
x=-6+1/2

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