solve by elimination method.
0.3x-0.2y=4
0.5x+0.3y=-7/17

Question

amistre64 · Answer

....... fractions and decies eh

amistre64 · Answer

0.3x-0.2y=4
0.5x+0.3y=-7/17   ; *10 the whole shebang

3x- 2y=40
5x+ 3y=-70/17  <- *17


  3x- 2y = 40
85x+51y=-70

amistre64 · Answer

3x- 2y = 40  <-  * -85/3 i spose
85x+51y=-70

amistre64 · Answer

-85x +(85)2/3y = -(85)40/3
  85x +51(3)/3y= -70(3)/3
---------------------------
            323/3y = -3610/3

                     y =  -3610/323

thats messy

anonymous · Answer

i got that far, but am lost right after that

dumbcow · Answer

Instead of substituting back in y to get x, you could try multiply top by 51 and bottom by 2
153x -102y = 2040
170x +102y = -140
__________________
323x  = 1900
x = 1900/323