1.

Solve the simultaneous equations 6 x + 5 y = 20 5 x + 2 y = 21

Answer»

Step-by-step explanation:

6x+5y=20

6x=20-5y

X= 20-5y/6

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5x+2y=21

5 (20-5y/6)+2y=21

100-25y/6+2y=21

100-25y+12y/6=21

100-13y=126

100-126=13y

-26/13=y

y= -2

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x=20-5y/6

20-5 (-2)/6

20+10/6

30/6

x = 5

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