Question 210705
{{{2x/3 + 4x/8 = 15}}}
Add the x terms together. Just like any other time you add fractions, find the LCD. in this case LCD=24:
{{{(16x+12x)/24=15}}}
Multiply both sides of equation by 24:
{{{16x+12x=360}}}
Combine the x terms:
{{{28x=360}}}
Divide each side by 28, reduce, and you are done:
{{{highlight(x=90/7)}}}
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Based on this method, you should be able to do the other two problems.
Good Luck,
tutor_paul@yahoo.com