Answered

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Solve using elimination method
7x+15y=32
X-3y=20

Sagot :

rhapsodyofwords
1. 7x+15y=32
2. x-3y=20/*5
2. 5x-15y=100
1.+2.= >12x=132
             x=11
1. 7*11+15y=32
     15y= -45
        y= -3
x=11;y=-3





eu99li

{7x+15y=32
{x-3y=20    /*5


{7x+15y=32

{ 5x-15y=100     (+)

7x+5x+15y-15y=32+100

12x=132    /:12

x=11

x-3y=20

11-3y=20    /-11

-3y=  9    /:(-3)

y=-3

The solution:  (11; -3)


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