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ok whatis x/3+x/4=1

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3 Answers

Hi Owen;
x/3+x/4=1
(x/3)+(x/4)=1
(x/3)(4/4)=4x/12
(x/4)(3/3)=3x/12
(4x/12)+(3x/12)=1
7x/12=1
Let's multiply both sides by 12...
(12)(7x/12)=1(12)
7x=12
Let's divide both sides by 7...
(7x)/7=12/7
x=12/7
 
So we're given X / 3 + X / 4 = 1
Find the LCM of 3 & 4 that would give 12
 
Now using 12 we divide both side which would give
 
4x + 3x / 12 = 1
Cross multiply both sides we'd have;
4x + 3x = 12
 
which then gives
7x = 12
solving for x, we divide both sides by 7;
7x / 7 = 12 / 7
Giving
 
X = 12 / 7
multiplying both sides of the equation by 12 yields 4x +3x = 12 so 7x=12 and x=12/7