Question 352445
HI.
*Note: Isolate the variable (to be solve for) on one side the equation.
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In the examples you have given: Isolating the variableis done by performing addition, subtraction. multiplication or division on "both" sides of the equation
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r-2x=14 for x  
Isolate x by subtracting 14 from and adding 2x to both sides of the equation
r-14 = 2x
divide the terms on both sides of the equation by 2
r/2 - 7 = x
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V=1/3bh for b 
Isolate b by dividing both sides of equation by h
V/h = (1/3)b
multiply both sides of the equation by 3
3V/h = b
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2x+a=4 for x 
isolate x by subtracting 'a'
2x = 4 - a
divide the terms on both sides of the equation by 2
x = 2 - a/2
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m-2.7=-1.5+1 
Isolate m by adding 2.7 to both sides of the equation
m = -1.5 + 1 +2.7
m = 2.2
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3(q-2)+2=5q-7-2q 
fist combine like terms on both sides of the equation
3q -6 +2 = 3q - 7
3q -4 = 3q - 7
NOTE: There is no way to isolate the variable on one side of the equation
Subtracting 3q from both sides: variable disappears..leaving
-4 = -7
This is a false statement, therefore there is NO solution for x