Question 473423
Let a and b be the 2 numbers:
a + b = 3.9
a - b = 0.9
a*b = 3.6
Lets solve for a in 2nd equation:
{{{a - b = 0.9}}}
Add b on both sides
{{{a = b + 0.9}}}
Now substitute this in for a in 1st equation:
{{{(b+0.9) + b = 3.9}}}
Add like terms
{{{2b + 0.9 = 3.9}}}
Subtract 0.9 on both sides
{{{2b = 3}}}
Divide by 2 on both sides
{{{b = 1.5}}}
Substitute this value in for b to solve for a:
{{{a = b + 0.9}}}
{{{a = 1.5 + 0.9}}}
{{{a = 2.4}}}
Therefore the 2 numbers are 1.5 and 2.4
You can check that 1.5*2.4 = 3.6