algebra
posted by Lisa .
How do you solve the following equation? I know x= 20 but do not know how to show the work.
Please help...

Something is missing here.

The equation is :
0.5(x12) = 4
Also another problem is :
2/3 + y = 3/4
How do you divide this fraction
Thanks 
0.5(x12) = 4
Multiply by 0.5
0.5x  6.0 = 4
Add 6.0 to both sides of the equation.
0.5x = 10
Divide both sides by 0.5
x = 20
_________________________
2/3 + y = 3/4
y = 3/4  2/3
y = 9/12  8/12
y = ??
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