Question

1.8x + y=12
1.4x+1.4y = 11.2

SOLVE BY SUBSTITUTION METHOD!
(IT IS SIMULTANEOUS EQUATION)​

Answer 1

Step-by-step explanation:

y=12-1.8x

1.4x+ 1.4(12-1.8x)=11.2

1.4x + 16.8- 2.52x =11.2

16.8-11.2=1.12x

x= 5.6/1.12

x=5

y=12- 1.8×5

y= 12- 9

y=3