3 years ago

Solve the system of the linear equation using any method: 2x+5y=4 4x+7y=11

Mathematics

2 answers:

Olegator [25]3 years ago

4 0

(-1,4.5) will be the answer.

mr_godi [17]3 years ago

3 0

Multiply the first equation by 2:
4x+10y=8
Subtract the second equation from this so the 4x cancels:
3y = -3
y = -1
Plug into first equation:
2x -5 = 4
2x = 9
x = 9/2 = 4 1/2 = 4.5
So (x,y) = (-1,4.5)

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