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lord [1]
3 years ago
5

Help me as quick as possible 11x+4y=12 9x-4y=8 Solve it with elimination method

Mathematics
1 answer:
Firdavs [7]3 years ago
3 0

Answer:

x = 1, y = 1/4

Step-by-step explanation:

11x + 4 y = 12   \ \ \ ---( 1)\\9x -4y = 8 \ \ \  - - - (2)\\\\(1) + ( 2 ) => 20x + 0 = 20\\\\

            => x = 1

Substitute x = 1 in ( 1 ) :  

                            11 + 4y = 12\\4y = 12 - 11\\\\y =\frac{1}{4}

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Step-by-step explanation:

Remember, if we need to divide the interval (a,b) in n equal subinterval, then we need divide the distance (d) between the endpoints of the interval and divide it by n. Then the width Δn of each subinterval is d/n.

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So,

x_0=-5\\x_1=-2\\x_2=1\\x_3=4\\x_4=7

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