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About LinkBacksIf (2,1) is a solution of the simultaneous equations
x(square) + xy + ay = b
2ax + 3y = b
find the value of a and b.
Find also the other solution.
I was able to find out
a=1
b=7
But not the other solution.
the answer is supposed to be:
x=-7 and y=7
Simultaneous equations
If (2,1) is a solution of the simultaneous equations
x(square) + xy + ay = b
2ax + 3y = b
find the value of a and b.
Find also the other solution.
I was able to find out
a=1
b=7
But not the other solution.
the answer is supposed to be:
x=-7 and y=7
1. Plug in the values of a and b into the two equations:Originally Posted by Ilsa
If (2,1) is a solution of the simultaneous equations
x(square) + xy + ay = b
2ax + 3y = b
find the value of a and b.
Find also the other solution.
I was able to find out
a=1
b=7 <====== OK
But not the other solution.
the answer is supposed to be:
x=-7 and y=7
2. Determine x from the 2nd equation:
3. Now replace x in the 1st equation byand solve for y:
4. Plug in the value of y into the equation at 2. to get the value of x.
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