Question

Solve by elimination 9x+10y
29
10x+9y= 28​

Answer 1

Step-by-step explanation:

9x+10y=29 ........×10

10x+9y=28 ........×9

90x+100y =290

90x+81y =252

_ _ -

181y = 542

y = 542÷181

y = 2.99 .......(1)

9x+10y=29

9x+10×2.99=29

9x+29.9=29

9x=29-29.9

9x=(-0.9)

x=(-0.9)÷9

x=(-0.1) ............(2)