Question

0.6x--0.3y=2.4 and 0.7x-0.4y=2.9 by elimination method ​

Answer 1

Answer:

multiply by 10 so

6x-3y = 24 and 7x -4y =29

2x- y=8 and 7x- 4y =29

multply (1) by 4 ------- 8x- 4y= 32

subtract 2 from1''

so (8x-7x)+ (-4y- [-4y])= 32-29

x= 3 subsitute this in (1)

2(3) - y=8------------ y= -2

x= 3 and y= -2.

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