2x + 3y = 7 3x + 2y = 8
1 answer:
Answer:
Step-by-step explanation:
Hello,
Pls post the full question next time so that we can make sure what is expected.
I assume that you want to solve for (x,y)
(1) 2x + 3y = 7
(2) 3x + 2y = 8
2*(2)-3*(1) gives
2*3x + 2*2y - 3*2x - 3*3y = 2*8 - 3*7 = 16 - 21 = -5
6x - 6x + 4y -9y = -5
-5y=-5
y = 1
and we can replace in (1)
2x + 3*1 = 7
2x = 7 - 3 = 4
x = 2
hope this helps
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Answer:
Equation C: 5/8x + 2..5 = 3/8x + 1.5 + 1/4x
Step-by-step explanation:
Let us go through each of the equations one by one.
Equation A:
This simplifies to
which has infinitely many solutions.
Equation B:
this simplifies to
which is exactly one solution.
Equation C:
this simplifies to
There's no way this is going to be possible; this equation has no solutions.
Equation D:
this gives
which is exactly one solution.
Thus we see that it is equation C that has no solutions.