You can
put this solution on YOUR website!Basically the same way you would solve otherwise.
3x-2.5y=7.125
2.5x-3y=7.3125
You should eleminate x or y and there is no particular advantage in picking one or the other in this case. So, let's pick x and use elimination:
Multiply the first equation by
and we get:
Now add this to the second equation and we get
Divide either side by -2.75/3 and we get y = -1.5. Substitute this value of y in to the first equation and we get x = 1.125.
It is important to verify these numbers using the original equations:
3x-2.5y=7.125 and
2.5x-3y=7.3125
become
3(1.125)-2.5(-1.5) = 3.375 + 3.75 = 7.125 and
2.5(1.125)-3(-1.5) = 2.8125 + 4.5 = 7.3125
You can
put this solution on YOUR website!First convert decimal into fractions:
So, first equation becomes:
On multiplying both sides by 8:
and, second equation becomes:
on multiplying both sides by 16:
Now, equations are:
... (1)
... (2)
Solve in usual steps to get x = 9/8 and y = -3/2
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