Question

Solve the system by using a table.
-0.2x-0.3y=0.2
0.4x-0.3y=1.4

Answer 1

@jim_thompson5910

Answer 2

do you know how to make a table?

Answer 3

yep

Answer 4

isn't it (2,2)?

Answer 5

let me check

Answer 6

-0.2x-0.3y=0.2
0.4x-0.3y=1.4


multiply the top equation by -1, then add the equations to get


0.2x+0.3y=-0.2
0.4x-0.3y=1.4
---------------
0.6x+0y = 1.2


so that means,


0.6x = 1.2

x = ??

Answer 7

2

Answer 8

so, i'm right?

Answer 9

x = 2, is correct

now use this to find y

Answer 10

y = 2 is NOT correct

Answer 11

1?

Answer 12

0.4x-0.3y=1.4

0.4*2-0.3y=1.4

0.8 - 0.3y = 1.4

-0.3y = 1.4 - 0.8

-0.3y = 0.6

y = ???